COEI-2-AMIBIO Qualitative method for detection of biogenic amines produced by lactic acid bacteria by thin-layer chromatography (TLC)

1. Principle

This method determines the ability to produce biogenic amines (BA) by bacteria in liquid culture media containing the corresponding amino-acid precursor.

COEI-2-CONGAZ Analyses of gas control by gaseous chromatography

1. Principle

The gases are controlled by chromatography in gaseous phase using a "molecular sieve" type column and detection by catharometer or flame ionisation.

2. Sampling

Either use

COEI-2-HMF Determination of 5-(hydroxymethyl) furfural

1. Principle

The 5-(hydroxymethyl)furfural (HMF) is determined by HPLC (sharing liquid chromatography in reverse phase).

COEI-1-ZEOLIT Zeolite Y-Faujasite

1. Object, origin and field of application

Zeolite Y-Faujasite is synthesized from alumina sources such as sodium aluminate and silica sources such as sodium silicate.

Zeolite Y-Faujasite incorporated in depth filtration filter sheets play an important role in simultaneously clarifying and selectively removing taint molecules which alter wine flavours

COEI-1-THIAMIN Thiamine hydrochloride

3-[(4-amino-2-methyl-5-pyrimidinyl)methyl-5-

(2-hydroxyethyl-4-methylthiazolium hydrochloride

Thiamini hydrochloridum

COEI-1-STYDVB Adsorbent styrene divinylbenzene beads

CAS N°9003-69-4

1. Object, origin and scope of application

The adsorbent beads enable the reduction or elimination of organoleptic deviations characterised as “earthy-musty” by a physical process of adsorption.

COEI-1-SOUDIO Liquid sulfur dioxide

Liquid sulfurous anhydride

Sulfuris dioxydum solutum

COEI-1-SORACI Sorbic acid

Trans,trans-hexa-2-4-dienoic acid

CH3-CH=CH-CH=CH-COOH

COEI-1-RESECA Cation exchange resins

1. Objective, origin and scope of application

Ion exchange is the reversible exchange of ions between a liquid and a solid, during the course of which the solid does not undergo any substantial changes.  When this technique is applied to wine, the solid is an insoluble, permeable synthetic resin capable of exchanging ions with the wine with which it is in contact.