Živočišné a rostlinné tuky a oleje - Stanovení chlorpropandiolů vázaných na mastné kyseliny (MCPD) a glycidolu metodou GC/MS - Část 2: Metoda využívající pomalé alkalické transesterifikace a měření 2-MCPD, 3-MCPD a glycidolu (Norma k přímému použití jako ČSN).
NORMA vydaná dňa 1.4.2019
Označenie normy: ČSN EN ISO 18363-2
Rozlišovací znak: 588725
Katalógové číslo: 506649
Dátum vydania normy: 1.4.2019
Počet strán: 36
Približná hmotnosť: 108 g (0.24 libier)
Krajina: Česká technická norma
Kategória: Technické normy ČSN
This document specifies a procedure for the parallel determination of glycidol together with 2-MCPD and 3-MCPD present in bound or free form in oils and fats. The method is based on alkaline-catalysed ester cleavage, transformation of the released glycidol into monobromopropanediol (MBPD) and derivatisation of the derived free diols (MCPD and MBPD) with phenylboronic acid (PBA). Though free MCPD and glycidol are supposed to be present in fats and oils in low to negligible quantities only, in the event that free analytes are present, they would contribute proportionately to the results. The results always being the sum of the free and the bound form of a single analyte. This method is applicable to solid and liquid fats and oils. This document can also apply to animal fats and used frying oils and fats, but a validation study is undertaken before the analysis of these matrices. Milk and milk products (or fat coming from milk and milk products) are excluded from the scope of this document