DETERMINATION OF REAL ALCOHOLIC STRENGTH BY VOLUME OF SPIRIT DRINKS - MEASUREMENT BY DENSIMETRY USING HYDROSTATIC BALANCE (Type II)
OIV-MA-BS-05 Reference method for the determination of real alcoholic strength by volume of spirit drinks of viti-vinicultural origin: Measurement by densimetry using hydrostatic balance
Type II method
DETERMINATION OF REAL ALCOHOLIC STRENGTH BY VOLUME OF SPIRIT DRINKS - MEASUREMENT BY ELECTRONIC DENSIMETRY (BASED ON THE RESONANT FREQUENCY OSCILLATION OF A SAMPLE IN AN OSCILLATING CELL) (Type II)
OIV-MA-BS-04 Reference method for the determination of real alcoholic strength by volume of spirit drinks of viti-vinicultural origin: measurement by electronic densimetry (based on the resonant frequency oscillation of a sample in an oscillating cell)
Type II method
DETERMINATION OF REAL ALCOHOLIC STRENGTH BY VOLUME OF SPIRIT DRINKS OF VITI-VINICULTURAL ORIGIN - MEASUREMENT BY PYCNOMETRY (Type II)
OIV-MA-BS-03 Reference method for the determination of real alcoholic strength by volume of spirit drinks of viti-vinicultural origin: measurement by pycnometry
Type II method
- Principle
The alcoholic strength by volume is obtained from the density of the distillate measured by pycnometry.
Zinc- Determination by AAS
COEI-2-ZINC Determination of zinc by atomic absorption spectrometry
- Principle
The zinc is determined directly by atomic absorption spectrometry by flame.
- Apparatus
Instrumental parameters: (given as an example)
Determination of the ability of an enzymatic preparation to interrupt pectic chains by measuring viscosity
COEI-2-VISCPE Determination of the ability of an enzymatic preparation to interrupt pectic chains by measuring viscosity
- Principle
Here, it is proposed to measure the quantity of enzyme needed to halve the viscosity of a standard solution with a given pH, temperature and time.
Tantalisation of platforms
COEI-2-TANTAL Tantalisation of platforms of l’Vov in graphite
- Preparation of tantalum solution at 6% (m/v) according to the zatka process
Three grammes of tantalum powder are put in a 100 ml Teflon cylindrical vase.
Add 10 ml of hydrofluoric acid diluted to a half, 3 g of dehydrated oxalic acid and 0.5 ml of hydrogen peroxide at 30 vol.
Heat carefully to dissolve the metal.
Sulphates- Research
COEI-2-SULFAT Search for sulphates
In a 160 16 mm test tube, place the volume prescribed of the solution obtained by the means indicated in each monography; add 1 ml of diluted hydrochloric acid (R); adjust to 20 ml with water and add 2 ml of barium chloride solution at 10% (R).
Sodium- Determination by AAS
COEI-2-SODIUM Determination of sodium by absorption atomic spectrometry
- Principle
The sodium is determined after mineralisation by dry process by atomic absorption spectrometry.
The addition of a spectral buffer (cesium chloride) to avoid ionisation of sodium is necessary.
Selenium- Determination by AAS
COEI-2-SELENI Determination of selenium by atomic absorption spectrometry
- Principle
After mineralisation of the sample by wet process, the selenium is determined by atomic absorption spectrometry without flame (electro-thermal atomisation in the graphite oven).