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Evaluation by refractometry of the sugar concentration in grape musts, concentrated grape musts and rectified concentrated grape musts (Type-I)

OIV-MA-AS2-02 Évaluation by refractometry of the sugar concentration in grape musts, concentrated grape musts and rectified concentrated grape musts

Type I method

 

  1. Principle

 

The refractive index at 20°C, expressed either as an absolute value or as a percentage by mass of sucrose, is given in the appropriate table to provide a means of obtaining the sugar concentration in grams per liter and in grams per kilogram for grape musts, concentrated grape musts and rectified concentrated grape musts.

  1. Apparatus

 

Abbe refractometer

The refractometer used must be fitted with a scale giving:

  • either percentage by mass of sucrose to 0.1%;
  • or refractive indices to four decimal places.

The refractometer must be equipped with a thermometer having a scale extending at least from +15°C to +25°C and with a system for circulating water that will enable measurements to be made at a temperature of 20 ± 5°C. The operating instructions for this instrument must be strictly adhered to, particularly with regard to calibration and the light source.

  1. Preparation of the sample
    1.   Must and concentrated must

Pass the must, if necessary, through a dry gauze folded into four and, after discarding the first drops of the filtrate, carry out the determination on the filtered product.

3.2.  Rectified concentrated must

Depending on the concentration, use either the rectified concentrated must itself or a solution obtained by making up 200 g of rectified concentrated must to 500 g with water, all weighings being carried out accurately.

  1. Procedure

Bring the sample to a temperature close to 20°C.

Place a small test sample on the lower prism of the refractometer, taking care (because the prisms are pressed firmly against each other) that this test sample covers the glass surface uniformly.  Carry out the measurement in accordance with the operating instructions of the instrument used.

Read the percentage by mass of sucrose to within 0.1 or read the refractive index to four decimal places.

Carry out at least two determinations on the same prepared sample.  Note the temperature t°C.

  1. Calculation

5.1.  Temperature correction

  • Instruments graduated in percentage by mass of sucrose: use Table I to obtain the temperature correction.
  • Instruments graduated in refractive index: find the index measured at t°C in Table II to obtain (column 1) the corresponding value of the percentage by mass of sucrose at t°C.  This value is corrected for temperature and expressed as a concentration at 20°C by means of Table I.
    1.   Sugar concentration in must and concentrated must

Find the percentage by mass of sucrose at 20°C in Table II and read from the same row the sugar concentration in grams per liter and grams per kilogram.  The sugar concentration is expressed in terms of invert sugar to one decimal place.

5.3.  Sugar concentration in rectified concentrated must

Find the percentage by mass of sucrose at 20°C in Table III and read from the same row the sugar concentration in grams per liter and grams per kilogram.  The sugar concentration is expressed in terms of invert sugar to one decimal place.               If the measurement was made on diluted rectified concentrated must, multiply the result by the dilution factor.

5.4.  Refractive index of must, concentrated must and rectified concentrated must

Find the percentage by mass of sucrose at 20°C in Table II and read from the same row the refractive index at 20°C.  This index is expressed to four decimal places.

Table I Correction to be made in the case where the percentage by mass of saccharose was determined at a temperature different by 20°C.

Temperature

Percentage by mass measured in %

°C

10

15

20

25

30

35

40

45

50

55

60

65

70

75

5

–0,82

–0,87

–0,92

–0,95

–0,99

6

–0,80

–0,82

–0,87

–0,90

–0,94

7

–0,74

–0,78

–0,82

–0,84

–0,88

8

–0,69

–0,73

–0,76

–0,79

–0,82

9

–0,64

–0,67

–0,71

–0,73

–0,75

10

–0,59

–0,62

–0,65

–0,67

–0,69

–0,71

–0,72

–0,73

–0,74

–0,75

–0,75

–0,75

–0,75

–0,75

11

–0,54

–0,57

–0,59

–0,61

–0,63

–0,64

–0,65

–0,66

–0,67

–0,68

–0,68

–0,68

–0,68

–0,67

12

–0,49

–0,51

–0,53

–0,55

–0,56

–0,57

–0,58

–0,59

–0,60

–0,60

–0,61

–0,61

–0,60

–0,60

13

–0,43

–0,45

–0,47

–0,48

–0,50

–0,51

–0,52

–0,52

–0,53

–0,53

–0,53

–0,53

–0,53

–0,53

14

–0,38

–0,39

–0,40

–0,42

–0,43

–0,44

–0,44

–0,45

–0,45

–0,46

–0,46

–0,46

–0,46

–0,45

15

–0,32

–0,33

–0,34

–0,35

–0,36

–0,37

–0,37

–0,38

–0,38

–0,38

–0,38

–0,38

–0,38

–0,38

16

–0,26

–0,27

–0,28

–0,28

–0,29

–0,30

–0,30

–0,30

–0,31

–0,31

–0,31

–0,31

–0,31

–0,30

17

–0,20

–0,20

–0,21

–0,21

–0,22

–0,22

–0,23

–0,23

–0,23

–0,23

–0,23

–0,23

–0,23

–0,23

18

–0,13

–0,14

–0,14

–0,14

–0,15

–0,15

–0,15

–0,15

–0,15

–0,15

–0,15

–0,15

–0,15

–0,15

19

–0,07

–0,07

–0,07

–0,07

–0,07

–0,08

–0,08

–0,08

–0,08

–0,08

–0,08

–0,08

–0,08

–0,08

20

0

R É F É R E N

C E

0

21

+0,07

+0,07

+0,07

+0,07

+0,08

+0,08

+0,08

+0,08

+0,08

+0,08

+0,08

+0,08

+0,08

+0,08

22

+0,14

+0,14

+0,15

+0,15

+0,15

+0,15

+0,16

+0,16

+0,16

+0,16

+0,16

+0,16

+0,15

+0,15

23

+0,21

+0,22

+0,22

+0,23

+0,23

+0,23

+0,23

+0,24

+0,24

+0,24

+0,24

+0,23

+0,23

+0,23

24

+0,29

+0,29

+0,30

+0,30

+0,31

+0,31

+0,31

+0,32

+0,32

+0,32

+0,32

+0,31

+0,31

+0,31

25

+0,36

+0,37

+0,38

+0,38

+0,39

+0,39

+0,40

+0,40

+0,40

+0,40

+0,40

+0,39

+0,39

+0,39

26

+0,44

+0,45

+0,46

+0,46

+0,47

+0,47

+0,48

+0,48

+0,48

+0,48

+0,48

+0,47

+0,47

+0,46

27

+0,52

+0,53

+0,54

+0,55

+0,55

+0,56

+0,56

+0,56

+0,56

+0,56

+0,56

+0,55

+0,55

+0,54

28

+0,60

+0,61

+0,62

+0,63

+0,64

+0,64

+0,64

+0,65

+0,65

+0,64

+0,64

+0,64

+0,63

+0,62

29

+0,68

+0,69

+0,70

+0,71

+0,72

+0,73

+0,73

+0,73

+0,73

+0,73

+0,72

+0,72

+0,71

+0,70

30

+0,77

+0,78

+0,79

+0,80

+0,81

+0,81

+0,81

+0,82

+0,81

+0,81

+0,81

+0,80

+0,79

+0,78

31

+0,85

+0,87

+0,88

+0,89

+0,89

+0,90

+0,90

+0,90

+0,90

+0,90

+0,89

+0,88

+0,87

+0,86

32

+0,94

+0,95

+0,96

+0,97

+0,98

+0,99

+0,99

+0,99

+0,99

+0,98

+0,97

+0,96

+0,95

+0,94

33

+1,03

+1,04

+1,05

+1,06

+1,07

+1,08

+1,08

+1,08

+1,07

+1,07

+1,06

+1,05

+1,03

+1,02

34

+1,12

+1,19

+1,15

+1,15

+1,16

+1,17

+1,17

+1,17

+1,16

+1,15

+1,14

+1,13

+1,12

+1,10

35

+1,22

+1,23

+1,24

+1,25

+1,25

+1,26

+1,26

+1,25

+1,25

+1,24

+1,23

+1,21

+1,20

+1,18

36

+1,31

+1,32

+1,33

+1,34

+1,35

+1,35

+1,35

+1,35

+1,34

+1,33

+1,32

+1,30

+1,28

+1,26

37

+1,41

+1,42

+1,43

+1,44

+1,44

+1,44

+1,44

+1,44

+1,43

+1,42

+1,40

+1,38

+1,36

+1,34

38

+1,51

+1,52

+1,53

+1,53

+1,54

+1,54

+1,53

+1,53

+1,52

+1,51

+1,49

+1,47

+1,45

+1,42

39

+1,61

+1,62

+1,62

+1,63

+1,63

+1,63

+1,63

+1,62

+1,61

+1,60

+1,58

+1,56

+1,53

+1,50

40

+1,71

+1,72

+1,72

+1,73

+1,73

+1,73

+1,72

+1,71

+1,70

+1,69

+1,67

+1,64

+1,62

+1,59

It is preferable that the variations in temperature in relation to 20°C do not exceed  5°C.

TABLE II

Table giving the sugar content of musts and concentrated musts in grammes per litre and in grammes per kilogramme, determined using a graduated refractometer, either in percentage by mass of saccharose at 20°C, or refractive index at 20°C. The mass density at 20°C is also given.

Saccharose

Refractive Index

Mass

Sugars in

Sugars in

ABV % vol

at 20 °C

% (m/m)

at 20 °C

Density at 20 °C

g/l

g/kg

at 20 °C

10.0

1.34782

1.0391

82.2

79.1

4.89

10.1

1.34798

1.0395

83.3

80.1

4.95

10.2

1.34813

1.0399

84.3

81.1

5.01

10.3

1.34829

1.0403

85.4

82.1

5.08

10.4

1.34844

1.0407

86.5

83.1

5.14

10.5

1.34860

1.0411

87.5

84.1

5.20

10.6

1.34875

1.0415

88.6

85.0

5.27

10.7

1.34891

1.0419

89.6

86.0

5.32

10.8

1.34906

1.0423

90.7

87.0

5.39

10.9

1.34922

1.0427

91.8

88.0

5.46

11.0

1.34937

1.0431

92.8

89.0

5.52

11.1

1.34953

1.0436

93.9

90.0

5.58

11.2

1.34968

1.0440

95.0

91.0

5.65

11.3

1.34984

1.0444

96.0

92.0

5.71

11.4

1.34999

1.0448

97.1

92.9

5.77

11.5

1.35015

1.0452

98.2

93.9

5.84

11.6

1.35031

1.0456

99.3

94.9

5.90

11.7

1.35046

1.0460

100.3

95.9

5.96

11.8

1.35062

1.0464

101.4

96.9

6.03

11.9

1.35077

1.0468

102.5

97.9

6.09

12.0

1.35093

1.0472

103.5

98.9

6.15

12.1

1.35109

1.0477

104.6

99.9

6.22

12.2

1.35124

1.0481

105.7

100.8

6.28

12.3

1.35140

1.0485

106.8

101.8

6.35

12.4

1.35156

1.0489

107.8

102.8

6.41

12.5

1.35171

1.0493

108.9

103.8

6.47

12.6

1.35187

1.0497

110.0

104.8

6.54

12.7

1.35203

1.0501

111.1

105.8

6.60

12.8

1.35219

1.0506

112.2

106.8

6.67

12.9

1.35234

1.0510

113.2

107.8

6.73

13.0

1.35250

1.0514

114.3

108.7

6.79

13.1

1.35266

1.0518

115.4

109.7

6.86

13.2

1.35282

1.0522

116.5

110.7

6.92

13.3

1.35298

1.0527

117.6

111.7

6.99

13.4

1.35313

1.0531

118.7

112.7

7.05

13.5

1.35329

1.0535

119.7

113.7

7.11

13.6

1.35345

1.0539

120.8

114.7

7.18

13.7

1.35361

1.0543

121.9

115.6

7.24

13.8

1.35377

1.0548

123.0

116.6

7.31

13.9

1.35393

1.0552

124.1

117.6

7.38

14.0

1.35408

1.0556

125.2

118.6

7.44

14.1

1.35424

1.0560

126.3

119.6

7.51

14.2

1.35440

1.0564

127.4

120.6

7.57

14.3

1.35456

1.0569

128.5

121.6

7.64

14.4

1.35472

1.0573

129.6

122.5

7.70

14.5

1.35488

1.0577

130.6

123.5

7.76

14.6

1.35504

1.0581

131.7

124.5

7.83

14.7

1.35520

1.0586

132.8

125.5

7.89

14.8

1.35536

1.0590

133.9

126.5

7.96

14.9

1.35552

1.0594

135.0

127.5

8.02

TABLE II - (continued)

Saccharose

Refractive Index

Mass

Sugars in

Sugars in

ABV % vol

at 20 °C

% (m/m)

at 20 °C

Density at 20 °C

g/l

g/kg

at 20 °C

15.0

1.35568

1.0598

136.1

128.4

8.09

15.1

1.35584

1.0603

137.2

129.4

8.15

15.2

1.35600

1.0607

138.3

130.4

8.22

15.3

1.35616

1.0611

139.4

131.4

8.28

15.4

1.35632

1.0616

140.5

132.4

8.35

15.5

1.35648

1.0620

141.6

133.4

8.42

15.6

1.35664

1.0624

142.7

134.3

8.48

15.7

1.35680

1.0628

143.8

135.3

8.55

15.8

1.35696

1.0633

144.9

136.3

8.61

15.9

1.35713

1.0637

146.0

137.3

8.68

16.0

1.35729

1.0641

147.1

138.3

8.74

16.1

1.35745

1.0646

148.2

139.3

8.81

16.2

1.35761

1.0650

149.3

140.2

8.87

16.3

1.35777

1.0654

150.5

141.2

8.94

16.4

1.35793

1.0659

151.6

142.2

9.01

16.5

1.35810

1.0663

152.7

143.2

9.07

16.6

1.35826

1.0667

153.8

144.2

9.14

16.7

1.35842

1.0672

154.9

145.1

9.21

16.8

1.35858

1.0676

156.0

146.1

9.27

16.9

1.35874

1.0680

157.1

147.1

9.34

17.0

1.35891

1.0685

158.2

148.1

9.40

17.1

1.35907

1.0689

159.3

149.1

9.47

17.2

1.35923

1.0693

160.4

150.0

9.53

17.3

1.35940

1.0698

161.6

151.0

9.60

17.4

1.35956

1.0702

162.7

152.0

9.67

17.5

1.35972

1.0707

163.8

153.0

9.73

17.6

1.35989

1.0711

164.9

154.0

9.80

17.7

1.36005

1.0715

166.0

154.9

9.87

17.8

1.36021

1.0720

167.1

155.9

9.93

17.9

1.36038

1.0724

168.3

156.9

10.00

18.0

1.36054

1.0729

169.4

157.9

10.07

18.1

1.36070

1.0733

170.5

158.9

10.13

18.2

1.36087

1.0737

171.6

159.8

10.20

18.3

1.36103

1.0742

172.7

160.8

10.26

18.4

1.36120

1.0746

173.9

161.8

10.33

18.5

1.36136

1.0751

175.0

162.8

10.40

18.6

1.36153

1.0755

176.1

163.7

10.47

18.7

1.36169

1.0760

177.2

164.7

10.53

18.8

1.36185

1.0764

178.4

165.7

10.60

18.9

1.36202

1.0768

179.5

166.7

10.67

19.0

1.36219

1.0773

180.6

167.6

10.73

19.1

1.36235

1.0777

181.7

168.6

10.80

19.2

1.36252

1.0782

182.9

169.6

10.87

19.3

1.36268

1.0786

184.0

170.6

10.94

19.4

1.36285

1.0791

185.1

171.5

11.00

19.5

1.36301

1.0795

186.2

172.5

11.07

19.6

1.36318

1.0800

187.4

173.5

11.14

19.7

1.36334

1.0804

188.5

174.5

11.20

19.8

1.36351

1.0809

189.6

175.4

11.27

19.9

1.36368

1.0813

190.8

176.4

11.34

TABLE II - (continued

Saccharose

Refractive Index

Mass

Sugars in

Sugars in 

ABV % vol

at 20 °C

% (m/m)

at 20 °C

Density at 20 °C

g/l

g/kg

at 20 °C

20.0

1.36384

1.0818

191.9

177.4

11.40

20.1

1.36401

1.0822

193.0

178.4

11.47

20.2

1.36418

1.0827

194.2

179.3

11.54

20.3

1.36434

1.0831

195.3

180.3

11.61

20.4

1.36451

1.0836

196.4

181.3

11.67

20.5

1.36468

1.0840

197.6

182.3

11.74

20.6

1.36484

1.0845

198.7

183.2

11.81

20.7

1.36501

1.0849

199.8

184.2

11.87

20.8

1.36518

1.0854

201.0

185.2

11.95

20.9

1.36535

1.0858

202.1

186.1

12.01

21.0

1.36551

1.0863

203.3

187.1

12.08

21.1

1.36568

1.0867

204.4

188.1

12.15

21.2

1.36585

1.0872

205.5

189.1

12.21

21.3

1.36602

1.0876

206.7

190.0

12.28

21.4

1.36619

1.0881

207.8

191.0

12.35

21.5

1.36635

1.0885

209.0

192.0

12.42

21.6

1.36652

1.0890

210.1

192.9

12.49

21.7

1.36669

1.0895

211.3

193.9

12.56

21.8

1.36686

1.0899

212.4

194.9

12.62

21.9

1.36703

1.0904

213.6

195.9

12.69

22.0

1.36720

1.0908

214.7

196.8

12.76

22.1

1.36737

1.0913

215.9

197.8

12.83

22.2

1.36754

1.0917

217.0

198.8

12.90

22.3

1.36771

1.0922

218.2

199.7

12.97

22.4

1.36787

1.0927

219.3

200.7

13.03

22.5

1.36804

1.0931

220.5

201.7

13.10

22.6

1.36821

1.0936

221.6

202.6

13.17

22.7

1.36838

1.0940

222.8

203.6

13.24

22.8

1.36855

1.0945

223.9

204.6

13.31

22.9

1.36872

1.0950

225.1

205.5

13.38

23.0

1.36889

1.0954

226.2

206.5

13.44

23.1

1.36906

1.0959

227.4

207.5

13.51

23.2

1.36924

1.0964

228.5

208.4

13.58

23.3

1.36941

1.0968

229.7

209.4

13.65

23.4

1.36958

1.0973

230.8

210.4

13.72

23.5

1.36975

1.0977

232.0

211.3

13.79

23.6

1.36992

1.0982

233.2

212.3

13.86

23.7

1.37009

1.0987

234.3

213.3

13.92

23.8

1.37026

1.0991

235.5

214.2

14.00

23.9

1.37043

1.0996

236.6

215.2

14.06

24.0

1.37060

1.1001

237.8

216.2

14.13

24.1

1.37078

1.1005

239.0

217.1

14.20

24.2

1.37095

1.1010

240.1

218.1

14.27

24.3

1.37112

1.1015

241.3

219.1

14.34

24.4

1.37129

1.1019

242.5

220.0

14.41

24.5

1.37146

1.1024

243.6

221.0

14.48

24.6

1.37164

1.1029

244.8

222.0

14.55

24.7

1.37181

1.1033

246.0

222.9

14.62

24.8

1.37198

1.1038

247.1

223.9

14.69

24.9

1.37216

1.1043

248.3

224.8

14.76

TABLE II - (continued

 

 

 

TABLE II - (continued)
 

Saccharose

Refractive Index

Mass

Sugars in

Sugars in

ABV % vol

at 20 °C

% (m/m)

 at 20 °C

Density at 20 °C

g/l

g/kg

at 20 °C

35.0

1.39032

1.1537

370.5

321.1

22.02

35.1

1.39051

1.1542

371.8

322.1

22.10

35.2

1.39070

1.1547

373.0

323.0

22.17

35.3

1.39088

1.1552

374.3

324.0

22.24

35.4

1.39107

1.1557

375.5

324.9

22.32

35.5

1.39126

1.1563

376.8

325.9

22.39

35.6

1.39145

1.1568

378.0

326.8

22.46

35.7

1.39164

1.1573

379.3

327.8

22.54

35.8

1.39182

1.1578

380.6

328.7

22.62

35.9

1.39201

1.1583

381.8

329.6

22.69

36.0

1.39220

1.1588

383.1

330.6

22.77

36.1

1.39239

1.1593

384.4

331.5

22.84

36.2

1.39258

1.1598

385.6

332.5

22.92

36.3

1.39277

1.1603

386.9

333.4

22.99

36.4

1.39296

1.1609

388.1

334.4

23.06

36.5

1.39314

1.1614

389.4

335.3

23.14

36.6

1.39333

1.1619

390.7

336.3

23.22

36.7

1.39352

1.1624

392.0

337.2

23.30

36.8

1.39371

1.1629

393.2

338.1

23.37

36.9

1.39390

1.1634

394.5

339.1

23.45

37.0

1.39409

1.1640

395.8

340.0

23.52

37.1

1.39428

1.1645

397.0

341.0

23.59

37.2

1.39447

1.1650

398.3

341.9

23.67

37.3

1.39466

1.1655

399.6

342.9

23.75

37.4

1.39485

1.1660

400.9

343.8

23.83

37.5

1.39504

1.1665

402.1

344.7

23.90

37.6

1.39524

1.1671

403.4

345.7

23.97

37.7

1.39543

1.1676

404.7

346.6

24.05

37.8

1.39562

1.1681

406.0

347.6

24.13

37.9

1.39581

1.1686

407.3

348.5

24.21

38.0

1.39600

1.1691

408.6

349.4

24.28

38.1

1.39619

1.1697

409.8

350.4

24.35

38.2

1.39638

1.1702

411.1

351.3

24.43

38.3

1.39658

1.1707

412.4

352.3

24.51

38.4

1.39677

1.1712

413.7

353.2

24.59

38.5

1.39696

1.1717

415.0

354.2

24.66

38.6

1.39715

1.1723

416.3

355.1

24.74

38.7

1.39734

1.1728

417.6

356.0

24.82

38.8

1.39754

1.1733

418.8

357.0

24.89

38.9

1.39773

1.1738

420.1

357.9

24.97

39.0

1.39792

1.1744

421.4

358.9

25.04

39.1

1.39812

1.1749

422.7

359.8

25.12

39.2

1.39831

1.1754

424.0

360.7

25.20

39.3

1.39850

1.1759

425.3

361.7

25.28

39.4

1.39870

1.1765

426.6

362.6

25.35

39.5

1.39889

1.1770

427.9

363.6

25.43

39.6

1.39908

1.1775

429.2

364.5

25.51

39.7

1.39928

1.1780

430.5

365.4

25.58

39.8

1.39947

1.1786

431.8

366.4

25.66

39.9

1.39967

1.1791

433.1

367.3

25.74

TABLE II - (continued)

Saccharose

Refractive Index

Mass

Sugars in

Sugars in

ABV % vol

at 20 °C

% (m/m)

 at 20 °C

Density at 20 °C

g/l

g/kg

at 20 °C

40.0

1.39986

1.1796

434.4

368.3

25.82

40.1

1.40006

1.1801

435.7

369.2

25.89

40.2

1.40025

1.1807

437.0

370.1

25.97

40.3

1.40044

1.1812

438.3

371.1

26.05

40.4

1.40064

1.1817

439.6

372.0

26.13

40.5

1.40083

1.1823

440.9

373.0

26.20

40.6

1.40103

1.1828

442.2

373.9

26.28

40.7

1.40123

1.1833

443.6

374.8

26.36

40.8

1.40142

1.1839

444.9

375.8

26.44

40.9

1.40162

1.1844

446.2

376.7

26.52

41.0

1.40181

1.1849

447.5

377.7

26.59

41.1

1.40201

1.1855

448.8

378.6

26.67

41.2

1.40221

1.1860

450.1

379.5

26.75

41.3

1.40240

1.1865

451.4

380.5

26.83

41.4

1.40260

1.1871

452.8

381.4

26.91

41.5

1.40280

1.1876

454.1

382.3

26.99

41.6

1.40299

1.1881

455.4

383.3

27.06

41.7

1.40319

1.1887

456.7

384.2

27.14

41.8

1.40339

1.1892

458.0

385.2

27.22

41.9

1.40358

1.1897

459.4

386.1

27.30

42.0

1.40378

1.1903

460.7

387.0

27.38

42.1

1.40398

1.1908

462.0

388.0

27.46

42.2

1.40418

1.1913

463.3

388.9

27.53

42.3

1.40437

1.1919

464.7

389.9

27.62

42.4

1.40457

1.1924

466.0

390.8

27.69

42.5

1.40477

1.1929

467.3

391.7

27.77

42.6

1.40497

1.1935

468.6

392.7

27.85

42.7

1.40517

1.1940

470.0

393.6

27.93

42.8

1.40537

1.1946

471.3

394.5

28.01

42.9

1.40557

1.1951

472.6

395.5

28.09

43.0

1.40576

1.1956

474.0

396.4

28.17

43.1

1.40596

1.1962

475.3

397.3

28.25

43.2

1.40616

1.1967

476.6

398.3

28.32

43.3

1.40636

1.1973

478.0

399.2

28.41

43.4

1.40656

1.1978

479.3

400.2

28.48

43.5

1.40676

1.1983

480.7

401.1

28.57

43.6

1.40696

1.1989

482.0

402.0

28.65

43.7

1.40716

1.1994

483.3

403.0

28.72

43.8

1.40736

1.2000

484.7

403.9

28.81

43.9

1.40756

1.2005

486.0

404.8

28.88

44.0

1.40776

1.2011

487.4

405.8

28.97

44.1

1.40796

1.2016

488.7

406.7

29.04

44.2

1.40817

1.2022

490.1

407.6

29.13

44.3

1.40837

1.2027

491.4

408.6

29.20

44.4

1.40857

1.2032

492.8

409.5

29.29

44.5

1.40877

1.2038

494.1

410.4

29.36

44.6

1.40897

1.2043

495.5

411.4

29.45

44.7

1.40917

1.2049

496.8

412.3

29.52

44.8

1.40937

1.2054

498.2

413.3

29.61

44.9

1.40958

1.2060

499.5

414.2

29.69

TABLE II (continued)

Saccharose

Refractive Index

Mass

Sugars in

Sugars in

ABV % vol

at 20 °C

 

 

 

TABLE II - (continued)
 

Saccharose

Refractive Index

Mass

Sugars in

Sugars in

ABV % vol

at 20 °C

% (m/m)

 at 20 °C

Density at 20 °C

g/l

g/kg

at 20 °C

60.0

1.44193

1.2937

716.6

553.9

42.59

60.1

1.44216

1.2943

718.1

554.8

42.68

60.2

1.44238

1.2949

719.6

555.7

42.77

60.3

1.44261

1.2956

721.1

556.6

42.85

60.4

1.44284

1.2962

722.7

557.5

42.95

60.5

1.44306

1.2968

724.2

558.4

43.04

60.6

1.44329

1.2974

725.7

559.4

43.13

60.7

1.44352

1.2980

727.3

560.3

43.22

60.8

1.44375

1.2986

728.8

561.2

43.31

60.9

1.44398

1.2993

730.3

562.1

43.40

61.0

1.44420

1.2999

731.8

563.0

43.49

61.1

1.44443

1.3005

733.4

563.9

43.59

61.2

1.44466

1.3011

734.9

564.8

43.68

61.3

1.44489

1.3017

736.4

565.7

43.76

61.4

1.44512

1.3024

738.0

566.6

43.86

61.5

1.44535

1.3030

739.5

567.6

43.95

61.6

1.44558

1.3036

741.1

568.5

44.04

61.7

1.44581

1.3042

742.6

569.4

44.13

61.8

1.44604

1.3049

744.1

570.3

44.22

61.9

1.44627

1.3055

745.7

571.2

44.32

62.0

1.44650

1.3061

747.2

572.1

44.41

62.1

1.44673

1.3067

748.8

573.0

44.50

62.2

1.44696

1.3074

750.3

573.9

44.59

62.3

1.44719

1.3080

751.9

574.8

44.69

62.4

1.44742

1.3086

753.4

575.7

44.77

62.5

1.44765

1.3092

755.0

576.6

44.87

62.6

1.44788

1.3099

756.5

577.5

44.96

62.7

1.44811

1.3105

758.1

578.5

45.05

62.8

1.44834

1.3111

759.6

579.4

45.14

62.9

1.44858

1.3118

761.2

580.3

45.24

63.0

1.44881

1.3124

762.7

581.2

45.33

63.1

1.44904

1.3130

764.3

582.1

45.42

63.2

1.44927

1.3137

765.8

583.0

45.51

63.3

1.44950

1.3143

767.4

583.9

45.61

63.4

1.44974

1.3149

769.0

584.8

45.70

63.5

1.44997

1.3155

770.5

585.7

45.79

63.6

1.45020

1.3162

772.1

586.6

45.89

63.7

1.45043

1.3168

773.6

587.5

45.98

63.8

1.45067

1.3174

775.2

588.4

46.07

63.9

1.45090

1.3181

776.8

589.3

46.17

64.0

1.45113

1.3187

778.3

590.2

46.25

64.1

1.45137

1.3193

779.9

591.1

46.35

64.2

1.45160

1.3200

781.5

592.0

46.44

64.3

1.45184

1.3206

783.0

592.9

46.53

64.4

1.45207

1.3213

784.6

593.8

46.63

64.5

1.45230

1.3219

786.2

594.7

46.72

64.6

1.45254

1.3225

787.8

595.6

46.82

64.7

1.45277

1.3232

789.3

596.5

46.91

64.8

1.45301

1.3238

790.9

597.4

47.00

64.9

1.45324

1.3244

792.5

598.3

47.10

 

TABLE II - (continued)

Saccharose

Refractive Index

Mass

Sugars in

Sugars in

ABV % vol

at 20 °C

% (m/m)

at 20 °C

Density at 20 °C

g/l

g/kg

at 20 °C

70.0

1.46546

1.3576

874.5

644.1

51.97

70.1

1.46570

1.3583

876.1

645.0

52.07

70.2

1.46594

1.3590

877.7

645.9

52.16

70.3

1.46619

1.3596

879.4

646.8

52.26

70.4

1.46643

1.3603

881.0

647.7

52.36

70.5

1.46668

1.3610

882.7

648.5

52.46

70.6

1.46692

1.3616

884.3

649.4

52.55

70.7

1.46717

1.3623

886.0

650.3

52.65

70.8

1.46741

1.3630

887.6

651.2

52.75

70.9

1.46766

1.3636

889.3

652.1

52.85

71.0

1.46790

1.3643

890.9

653.0

52.95

71.1

1.46815

1.3650

892.6

653.9

53.05

71.2

1.46840

1.3656

894.2

654.8

53.14

71.3

1.46864

1.3663

895.9

655.7

53.24

71.4

1.46889

1.3670

897.5

656.6

53.34

71.5

1.46913

1.3676

899.2

657.5

53.44

71.6

1.46938

1.3683

900.8

658.3

53.53

71.7

1.46963

1.3690

902.5

659.2

53.64

71.8

1.46987

1.3696

904.1

660.1

53.73

71.9

1.47012

1.3703

905.8

661.0

53.83

72.0

1.47037

1.3710

907.5

661.9

53.93

72.1

1.47062

1.3717

909.1

662.8

54.03

72.2

1.47086

1.3723

910.8

663.7

54.13

72.3

1.47111

1.3730

912.5

664.6

54.23

72.4

1.47136

1.3737

914.1

665.5

54.32

72.5

1.47161

1.3743

915.8

666.3

54.43

72.6

1.47186

1.3750

917.5

667.2

54.53

72.7

1.47210

1.3757

919.1

668.1

54.62

72.8

1.47235

1.3764

920.8

669.0

54.72

72.9

1.47260

1.3770

922.5

669.9

54.82

73.0

1.47285

1.3777

924.2

670.8

54.93

73.1

1.47310

1.3784

925.8

671.7

55.02

73.2

1.47335

1.3791

927.5

672.6

55.12

73.3

1.47360

1.3797

929.2

673.5

55.22

73.4

1.47385

1.3804

930.9

674.3

55.32

73.5

1.47410

1.3811

932.6

675.2

55.42

73.6

1.47435

1.3818

934.3

676.1

55.53

73.7

1.47460

1.3825

935.9

677.0

55.62

73.8

1.47485

1.3831

937.6

677.9

55.72

73.9

1.47510

1.3838

939.3

678.8

55.82

74.0

1.47535

1.3845

941.0

679.7

55.92

74.1

1.47560

1.3852

942.7

680.6

56.02

74.2

1.47585

1.3859

944.4

681.4

56.13

74.3

1.47610

1.3865

946.1

682.3

56.23

74.4

1.47635

1.3872

947.8

683.2

56.33

74.5

1.47661

1.3879

949.5

684.1

56.43

74.6

1.47686

1.3886

951.2

685.0

56.53

74.7

1.47711

1.3893

952.9

685.9

56.63

74.8

1.47736

1.3899

954.6

686.8

56.73

74.9

1.47761

1.3906

956.3

687.7

56.83

TABLE III: Table giving the sugar concentration in rectified concentrated must

in grams per liter and grams per kilogram.

determined by means of a refractometer graduated

either in percentage by mass of sucrose at 20°C

or in refractive index at 20°C.

TABLE III

Saccharose

% (m/m)

Refractive Index at 20 °C

Mass

Density at 20 °C

Sugars in

g/l

Sugars in

g/kg

ABV % vol

at 20 °C

50.0

1.42008

1.2342

627.6

508.5

37.30

50.1

1.42029

1.2348

629.3

509.6

37.40

50.2

1.42050

1.2355

630.9

510.6

37.49

50.3

1.42071

1.2362

632.4

511.6

37.58

50.4

1.42092

1.2367

634.1

512.7

37.68

50.5

1.42113

1.2374

635.7

513.7

37.78

50.6

1.42135

1.2381

637.3

514.7

37.87

50.7

1.42156

1.2386

638.7

515.7

37.96

50.8

1.42177

1.2391

640.4

516.8

38.06

50.9

1.42198

1.2396

641.9

517.8

38.15

51.0

1.42219

1.2401

643.4

518.8

38.24

51.1

1.42240

1.2406

645.0

519.9

38.33

51.2

1.42261

1.2411

646.5

520.9

38.42

51.3

1.42282

1.2416

648.1

522.0

38.52

51.4

1.42304

1.2421

649.6

523.0

38.61

51.5

1.42325

1.2427

651.2

524.0

38.70

51.6

1.42347

1.2434

652.9

525.1

38.80

51.7

1.42368

1.2441

654.5

526.1

38.90

51.8

1.42389

1.2447

656.1

527.1

38.99

51.9

1.42410

1.2454

657.8

528.2

39.09

52.0

1.42432

1.2461

659.4

529.2

39.19

52.1

1.42453

1.2466

661.0

530.2

39.28

52.2

1.42475

1.2470

662.5

531.3

39.37

52.3

1.42496

1.2475

664.1

532.3

39.47

52.4

1.42517

1.2480

665.6

533.3

39.56

52.5

1.42538

1.2486

667.2

534.4

39.65

52.6

1.42560

1.2493

668.9

535.4

39.75

52.7

1.42581

1.2500

670.5

536.4

39.85

52.8

1.42603

1.2506

672.2

537.5

39.95

52.9

1.42624

1.2513

673.8

538.5

40.04

53.0

1.42645

1.2520

675.5

539.5

40.14

53.1

1.42667

1.2525

677.1

540.6

40.24

53.2

1.42689

1.2530

678.5

541.5

40.32

53.3

1.42711

1.2535

680.2

542.6

40.42

53.4

1.42733

1.2540

681.8

543.7

40.52

53.5

1.42754

1.2546

683.4

544.7

40.61

53.6

1.42776

1.2553

685.1

545.8

40.72

53.7

1.42797

1.2560

686.7

546.7

40.81

53.8

1.42819

1.2566

688.4

547.8

40.91

53.9

1.42840

1.2573

690.1

548.9

41.01

54.0

1.42861

1.2580

691.7

549.8

41.11

54.1

1.42884

1.2585

693.3

550.9

41.20

54.2

1.42906

1.2590

694.9

551.9

41.30

54.3

1.42927

1.2595

696.5

553.0

41.39

54.4

1.42949

1.2600

698.1

554.0

41.49

54.5

1.42971

1.2606

699.7

555.1

41.58

54.6

1.42993

1.2613

701.4

556.1

41.68

54.7

1.43014

1.2620

703.1

557.1

41.79

54.8

1.43036

1.2625

704.7

558.2

41.88

54.9

1.43058

1.2630

706.2

559.1

41.97

TABLE III (continued)

Saccharose

% (m/m)

Refractive Index

 at 20 °C

Mass

Density at 20 °C

Sugars in

g/l

Sugars in

g/kg

ABV % vol

at 20 °C

55.0

1.43079

1.2635

707.8

560.2

42.06

55.1

1.43102

1.2639

709.4

561.3

42.16

55.2

1.43124

1.2645

711.0

562.3

42.25

55.3

1.43146

1.2652

712.7

563.3

42.36

55.4

1.43168

1.2659

714.4

564.3

42.46

55.5

1.43189

1.2665

716.1

565.4

42.56

55.6

1.43211

1.2672

717.8

566.4

42.66

55.7

1.43233

1.2679

719.5

567.5

42.76

55.8

1.43255

1.2685

721.1

568.5

42.85

55.9

1.43277

1.2692

722.8

569.5

42.96

56.0

1.43298

1.2699

724.5

570.5

43.06

56.1

1.43321

1.2703

726.1

571.6

43.15

56.2

1.43343

1.2708

727.7

572.6

43.25

56.3

1.43365

1.2713

729.3

573.7

43.34

56.4

1.43387

1.2718

730.9

574.7

43.44

56.5

1.43409

1.2724

732.6

575.8

43.54

56.6

1.43431

1.2731

734.3

576.8

43.64

56.7

1.43454

1.2738

736.0

577.8

43.74

56.8

1.43476

1.2744

737.6

578.8

43.84

56.9

1.43498

1.2751

739.4

579.9

43.94

57.0

1.43519

1.2758

741.1

580.9

44.04

57.1

1.43542

1.2763

742.8

582.0

44.14

57.2

1.43564

1.2768

744.4

583.0

44.24

57.3

1.43586

1.2773

745.9

584.0

44.33

57.4

1.43609

1.2778

747.6

585.1

44.43

57.5

1.43631

1.2784

749.3

586.1

44.53

57.6

1.43653

1.2791

751.0

587.1

44.63

57.7

1.43675

1.2798

752.7

588.1

44.73

57.8

1.43698

1.2804

754.4

589.2

44.83

57.9

1.43720

1.2810

756.1

590.2

44.94

58.0

1.43741

1.2818

757.8

591.2

45.04

58.1

1.43764

1.2822

759.5

592.3

45.14

58.2

1.43784

1.2827

761.1

593.4

45.23

58.3

1.43909

1.2832

762.6

594.3

45.32

58.4

1.43832

1.2837

764.3

595.4

45.42

58.5

1.43854

1.2843

766.0

596.4

45.52

58.6

1.43877

1.2850

767.8

597.5

45.63

58.7

1.43899

1.2857

769.5

598.5

45.73

58.8

1.43922

1.2863

771.1

599.5

45.83

58.9

1.43944

1.2869

772.9

600.6

45.93

59.0

1.43966

1.2876

774.6

601.6

46.03

59.1

1.43988

1.2882

776.3

602.6

46.14

59.2

1.44011

1.2889

778.1

603.7

46.24

59.3

1.44034

1.2896

779.8

604.7

46.34

59.4

1.44057

1.2902

781.6

605.8

46.45

59.5

1.44079

1.2909

783.3

606.8

46.55

59.6

1.44102

1.2916

785.2

607.9

46.66

59.7

1.44124

1.2921

786.8

608.9

46.76

59.8

1.44147

1.2926

788.4

609.9

46.85

59.9

1.44169

1.2931

790.0

610.9

46.95

Saccharose

% (m/m)

Refractive Index

at 20 °C

Mass

Density at 20 °C

Sugars in

g/l

Sugars  in

g/kg

ABV % vol

at 20 °C

65.0

1.45347

1.3248

879.7

664.0

52.28

65.1

1.45369

1.3255

881.5

665.0

52.39

65.2

1.45393

1.3261

883.2

666.0

52.49

65.3

1.45416

1.3268

885.0

667.0

52.60

65.4

1.45440

1.3275

886.9

668.1

52.71

65.5

1.45463

1.3281

888.8

669.2

52.82

65.6

1.45487

1.3288

890.6

670.2

52.93

65.7

1.45510

1.3295

892.4

671.2

53.04

65.8

1.45534

1.3301

894.2

672.3

53.14

65.9

1.45557

1.3308

896.0

673.3

53.25

66.0

1.45583

1.3315

898.0

674.4

53.37

66.1

1.45605

1.3320

899.6

675.4

53.46

66.2

1.45629

1.3325

901.3

676.4

53.56

66.3

1.45652

1.3330

903.1

677.5

53.67

66.4

1.45676

1.3335

904.8

678.5

53.77

66.5

1.45700

1.3341

906.7

679.6

53.89

66.6

1.45724

1.3348

908.5

680.6

53.99

66.7

1.45747

1.3355

910.4

681.7

54.11

66.8

1.45771

1.3361

912.2

682.7

54.21

66.9

1.45795

1.3367

913.9

683.7

54.31

67.0

1.45820

1.3374

915.9

684.8

54.43

67.1

1.45843

1.3380

917.6

685.8

54.53

67.2

1.45867

1.3387

919.6

686.9

54.65

67.3

1.45890

1.3395

921.4

687.9

54.76

67.4

1.45914

1.3400

923.1

688.9

54.86

67.5

1.45938

1.3407

925.1

690.0

54.98

67.6

1.45962

1.3415

927.0

691.0

55.09

67.7

1.45986

1.3420

928.8

692.1

55.20

67.8

1.46010

1.3427

930.6

693.1

55.31

67.9

1.46034

1.3434

932.6

694.2

55.42

68.0

1.46060

1.3440

934.4

695.2

55.53

68.1

1.46082

1.3447

936.2

696.2

55.64

68.2

1.46106

1.3454

938.0

697.2

55.75

68.3

1.46130

1.3460

939.9

698.3

55.86

68.4

1.46154

1.3466

941.8

699.4

55.97

68.5

1.46178

1.3473

943.7

700.4

56.08

68.6

1.46202

1.3479

945.4

701.4

56.19

68.7

1.46226

1.3486

947.4

702.5

56.30

68.8

1.46251

1.3493

949.2

703.5

56.41

68.9

1.46275

1.3499

951.1

704.6

56.52

69.0

1.46301

1.3506

953.0

705.6

56.64

69.1

1.46323

1.3513

954.8

706.6

56.74

69.2

1.46347

1.3519

956.7

707.7

56.86

69.3

1.46371

1.3526

958.6

708.7

56.97

69.4

1.46396

1.3533

960.6

709.8

57.09

69.5

1.46420

1.3539

962.4

710.8

57.20

69.6

1.46444

1.3546

964.3

711.9

57.31

69.7

1.46468

1.3553

966.2

712.9

57.42

69.8

1.46493

1.3560

968.2

714.0

57.54

69.9

1.46517

1.3566

970.0

715.0

57.65

Saccharose

% (m/m)

Refractive Index

 at 20 °C

Mass

Density à 20 °C

Sugars in

g/l

Sugars in

g/kg

ABV % vol

at 20 °C

70.0

1.46544

1.3573

971.8

716.0

57.75

70.1

1.46565

1.3579

973.8

717.1

57.87

70.2

1.46590

1.3586

975.6

718.1

57.98

70.3

1.46614

1.3593

977.6

719.2

58.10

70.4

1.46639

1.3599

979.4

720.2

58.21

70.5

1.46663

1.3606

981.3

721.2

58.32

70.6

1.46688

1.3613

983.3

722.3

58.44

70.7

1.46712

1.3619

985.2

723.4

58.55

70.8

1.46737

1.3626

987.1

724.4

58.66

70.9

1.46761

1.3633

988.9

725.4

58.77

71.0

1.46789

1.3639

990.9

726.5

58.89

71.1

1.46810

1.3646

992.8

727.5

59.00

71.2

1.46835

1.3653

994.8

728.6

59.12

71.3

1.46859

1.3659

996.6

729.6

59.23

71.4

1.46884

1.3665

998.5

730.7

59.34

71.5

1.46908

1.3672

1000.4

731.7

59.45

71.6

1.46933

1.3678

1002.2

732.7

59.56

71.7

1.46957

1.3685

1004.2

733.8

59.68

71.8

1.46982

1.3692

1006.1

734.8

59.79

71.9

1.47007

1.3698

1008.0

735.9

59.91

72.0

1.47036

1.3705

1009.9

736.9

60.02

72.1

1.47056

1.3712

1012.0

738.0

60.14

72.2

1.47081

1.3718

1013.8

739.0

60.25

72.3

1.47106

1.3725

1015.7

740.0

60.36

72.4

1.47131

1.3732

1017.7

741.1

60.48

72.5

1.47155

1.3738

1019.5

742.1

60.59

72.6

1.47180

1.3745

1021.5

743.2

60.71

72.7

1.47205

1.3752

1023.4

744.2

60.82

72.8

1.47230

1.3758

1025.4

745.3

60.94

72.9

1.47254

1.3765

1027.3

746.3

61.05

73.0

1.47284

1.3772

1029.3

747.4

61.17

73.1

1.47304

1.3778

1031.2

748.4

61.28

73.2

1.47329

1.3785

1033.2

749.5

61.40

73.3

1.47354

1.3792

1035.1

750.5

61.52

73.4

1.47379

1.3798

1037.1

751.6

61.63

73.5

1.47404

1.3805

1039.0

752.6

61.75

73.6

1.47429

1.3812

1040.9

753.6

61.86

73.7

1.47454

1.3818

1042.8

754.7

61.97

73.8

1.47479

1.3825

1044.8

755.7

62.09

73.9

1.47504

1.3832

1046.8

756.8

62.21

74.0

1.47534

1.3838

1048.6

757.8

62.32

74.1

1.47554

1.3845

1050.7

758.9

62.44

74.2

1.47579

1.3852

1052.6

759.9

62.56

74.3

1.47604

1.3858

1054.6

761.0

62.67

74.4

1.47629

1.3865

1056.5

762.0

62.79

74.5

1.47654

1.3871

1058.5

763.1

62.91

74.6

1.47679

1.3878

1060.4

764.1

63.02

74.7

1.47704

1.3885

1062.3

765.1

63.13

74.8

1.47730

1.3892

1064.4

766.2

63.26

74.9

1.47755

1.3898

1066.3

767.2

63.37

75.0

1.47785

1.3905

1068.3

768.3

63.49