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DIN EN 18337:2026-04

Food authenticity - Determination of <(hoch)18>O/<(hoch)16>O isotope ratios in liquid aqueous food matrices by Equilibration - Isotope Ratio Mass Spectrometry (Eq-IRMS); German and English version prEN 18337:2026 / Note: Date of issue 2026-03-13

Fecha edición: 2026-04-01
En Vigor
Idiomas disponibles: Alemán, Inglés
Resumen: This document specifies a method for instrumental analysis by equilibration-isotope ratio mass spectrometry (Eq-IRMS) of liquid, aqueous food matrices to determine ¹?O/¹?O isotope ratios of the water of the product. The ¹?O/¹?O isotope ratios obtained by following this document are expressed as ¹?O values relative to internationally recognised reference materials (RM). This document does not apply to sample preparation. It is assumed that the food sample has been pre-treated as necessary and homogenised. Similarly, the interpretation of the obtained ¹?O values is not covered by this document. Following this protocol will result only in isotope delta values for the sample materials. Although other instrumental techniques can be applied to determine ¹?O values in liquid, aqueous food materials, these other techniques are not covered by this document.
Keywords: Analysis|Aqueous|Definitions|Equilibrium|Food chemistry|Food control|Food products|Food testing|Isotopes|Liquid|Mass spectrometry|Matrices|Ratios|Testing|Water
ICS: 67.050 - Métodos generales de análisis y de ensayo de productos alimenticios
CTN:

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