Abstract

This document specifies a method for the determination of soluble 16-O-Methylcafestol and 16-O-Methylkahweol content (the sum of free forms and derivatives, e. g. fatty acidesters, henceforth abbreviated as 16-OMD = "diterpenes") in roasted coffee (beans or ground), using quantitative proton nuclear magnetic resonance spectroscopy (¹H-qNMR). If complying with the experimental parameters described below, this test procedure has been proven for the following mass fraction range: w16-OMD: 20 mg/kg to 2 000 mg/kg. The mass fraction range can be expanded by suitable changes of the experimental parameters, e. g. a different weighed portion of ground coffee or the accumulation of more NMR-transients.

Begin

2022-08-09

WI

00460008

Planned document number

DIN EN 17992

Project number

05702554

Responsible national committee

NA 057-08-02-04 AK - NMR-Analytics  

Responsible european committee

CEN/TC 460/WG 4 - NMR analysis  

draft standard

Food authenticity - Determination of the sum of 16-O-Methylcafestol, 16-O-Methylkahweol and their derivatives in roasted coffee by ¹H-qNM; German and English version prEN 17992:2023
2023-07
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