FprEN 17992
(Main)Food authenticity - Determination of the sum of 16-O-methylcafestol, 16-O-Methylkahweol and their derivatives in roasted coffee by ¹H-qNMR
Food authenticity - Determination of the sum of 16-O-methylcafestol, 16-O-Methylkahweol and their derivatives in roasted coffee by ¹H-qNMR
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.
Lebensmittelauthentizität - Bestimmung des Gehalts von 16-O-Methylcafestol, 16-O-Methylkahweol und deren Derivaten als Summenparameter in Röstkaffee mittels ¹H-qNMR
Dieses Dokument legt ein Verfahren zur Bestimmung des Gehalts an löslichem 16-O-Methylcafestol und 16 O-Methylkahweol (Summe der freien Formen und Derivate, z. B. Fettsäureester, im Folgenden abgekürzt als 16-OMD = "Diterpene") in geröstetem Kaffee (Bohnen oder gemahlen) mittels quantitativer Protonen-nuklearmagnetischer Resonanzspektroskopie (1H-qNMR) fest.
Bei Einhaltung der nachstehend beschriebenen Versuchsparameter hat sich dieses Prüfverfahren für den folgenden Konzentrationsbereich bewährt:
16-OMD: 20 mg/kg bis 2 000 mg/kg.
Der Konzentrationsbereich kann durch geeignete Änderungen der Versuchsparameter erweitert werden, z. B. durch eine andere Einwaage des gemahlenen Kaffees oder die Akkumulation von mehr NMR-Transienten.
Authenticité des aliments - Détermination par résonance magnétique nucléaire quantitative du proton (RMN-1H) de la somme des teneurs en 16-O-méthylcafestol, 16-O-méthylkahwéol et leurs dérivés dans le café torréfié
Le présent document spécifie une méthode de détermination de la teneur en 16-O-méthylcafestol et 16-O-méthylkahwéol (somme des formes libres et des dérivés, par exemple esters d’acides gras, désormais abrégé 16-OMD = « diterpènes ») dans le café torréfié (en grains ou moulu), par spectroscopie par résonance magnétique nucléaire quantitative du proton (qRMN 1H).
En respectant les paramètres expérimentaux décrits ci-dessous, ce mode opératoire d’essai a été validé pour la gamme de concentrations suivantes :
16-OMD : 20 mg/kg à 2 000 mg/kg.
La gamme de concentrations peut être élargie en modifiant adéquatement les paramètres expérimentaux, par exemple une prise d’essai différente de café moulu ou l’accumulation de plusieurs transitions RMN.
Pristnost živil - Določanje vsote 16-O-metilkafestola, 16-O-metilkaveola in njunih derivatov v praženi kavi z metodo ¹H-qNMR
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 17992:2023
01-september-2023
Pristnost živil - Določanje vsote 16-O-metilkafestola, 16-O-metilkaveola in njunih
derivatov v praženi kavi z metodo ¹H-qNMR
Food authenticity - Determination of the sum of 16-O-methylcafestol, 16-O-
Methylkahweol and their derivatives in roasted coffee by ¹H-qNMR
Lebensmittelauthentizität - Bestimmung des Gehalts von 16-O-Methylcafestol, 16-O-
Methylkahweol und deren Derivaten als Summenparameter in Röstkaffee mittels ¹H-
qNMR
Authenticité alimentaire du café - Détermination de la teneur en 16-O-méthylcafestol -
Méthode par NMR
Ta slovenski standard je istoveten z: prEN 17992
ICS:
67.140.20 Kava in kavni nadomestki Coffee and coffee substitutes
oSIST prEN 17992:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 17992:2023
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oSIST prEN 17992:2023
DRAFT
EUROPEAN STANDARD
prEN 17992
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2023
ICS 67.140
English Version
Food authenticity - Determination of the sum of 16-O-
Methylcafestol, 16-O-Methylkahweol and their
1
derivatives in roasted coffee by H-qNM
Authenticité alimentaire du café - Détermination de la Lebensmittelauthentizität - Bestimmung des Gehalts
teneur en 16-O-méthylcafestol - Méthode par NMR von 16-O-Methylcafestol, 16-O-Methylkahweol und
deren Derivaten als Summenparameter in Röstkaffee
1
mittels H-qNMR
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 460.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
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language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
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Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
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Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
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COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17992:2023 E
worldwide for CEN national Members.
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oSIST prEN 17992:2023
prEN 17992:2023 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Reagents . 8
5 Apparatus . 9
6 Measurement and test methods . 10
6.1 General. 10
6.2 Sampling .
...
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