Density and Specific Gravity at 20°C (Type-I-and-IV)
OIV-MA-AS2-01 Density and specific gravity at 20°C
Type I and IV methods
- Scope of application
This resolution is applicable for determining the density and specific gravity at 20 °C of wines and musts, using any of the following:
Determination of the distribution of deuterium in acetic extracted from wine vinegar using nuclear magnetic resonance (NMR) (Type IV)
OIV-MA-VI-24 Determination of the distribution of deuterium in acetic acid extracted from wine vinegar using nuclear magnetic resonance (NMR)
Type IV method
Method for 18O/16O isotope ratio determination of water in wine vinegar using isotopic mass spectrometry (Type II)
OIV-MA-VI-23 Method for 18O/16O isotope ratio determination of water in wine vinegar using isotopic mass spectrometry
Type II method
Method for 13C/12C isotope ratio determination of acetic acid in wine vinegar by isotopic mass spectrometry (Type II)
OIV-MA-VI-22 Method for of 
Detection of synthetic acetic acid in wine vinegars by the determination of beta radioactivity of 14c of acetic acid by liquid scintillation (Type IV)
OIV-MA-VI-21 Detection of synthetic acetic acid in wine vinegars by measuring the β emissions of 
Authentification via FINE-NMR and other isotopic methods (Type IV)
OIV-MA-VI-20 Authentification via fine- NMR® and other isotopic methods
Type IV method
- Objective and principle
The main objective for this procedure is to detect and measure synthetic acetic acid in vinegars and also detect any other downgrading of vinegars.
Measurement of methanol, superior alcohols and ethyl acetate (Type IV)
OIV-MA-VI-19 Measurement of methanol, superior alcohols and ethyl acetate
Type IV method
- Introduction
The method described here allows to measure, at the same time, several major volatile components of vinegars. The interest of this measurement is two-fold, organoleptic and possibly toxicologic.
Measurement of the acetoin content (Type IV)
OIV-MA-VI-18 Measurement of the acetoin content
Type IV method
Measurement of mercury content (cold vapour method) (Type IV)
OIV-MA-VI-17 Measurement of mercury content (cold vapour method)
Type IV method
- Principle
Vinegar mineralization: is performed in an acidic environment, through a reflux heating method; complete mineralization with potassium permanganate.