NF EN ISO 8292-2

July 2010

Standard Current

Animal and vegetable fats and oils - Determination of solid fat content by pulsed NMR - Part 2 : indirect method

ISO 8292-2:2008 specifies an indirect method for the determination of the solid fat content in animal and vegetable fats and oils (hereafter designated "fats") using low-resolution pulsed nuclear magnetic resonance spectrometry.Two alternative thermal pre-treatments are specified: one for general purpose fats not exhibiting pronounced polymorphism and which stabilize mainly in the β'-polymorph; and one for fats similar to cocoa butter which exhibit pronounced polymorphism and stabilize in the β-polymorph. Additional thermal pre-treatments, which may be more suitable for specific purposes, are given in an informative annex.The indirect method is less easy to carry out and less reproducible than the direct method, but is more accurate and more universally applicable to all fats.

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Main informations

Collections

National standards and national normative documents

Publication date

July 2010

Number of pages

34 p.

Reference

NF EN ISO 8292-2

ICS Codes

67.200.10 Animal and vegetable fats and oils

Classification index

T60-250-2

Print number

1 - 30/06/2010

International kinship

ISO 8292-2:2008

European kinship

EN 8292-2:2010

Sumary

Animal and vegetable fats and oils - Determination of solid fat content by pulsed NMR - Part 2 : indirect method

Two alternative thermal pre-treatments are specified: one for general purpose fats not exhibiting pronounced polymorphism and which stabilize mainly in the β'-polymorph; and one for fats similar to cocoa butter which exhibit pronounced polymorphism and stabilize in the β-polymorph. Additional thermal pre-treatments, which may be more suitable for specific purposes, are given in an informative annex.

The indirect method is less easy to carry out and less reproducible than the direct method, but is more accurate and more universally applicable to all fats.

Replaced standards (1)

NF EN ISO 8292

June 1995

Standard Cancelled

Animal and vegetable fats and oils. Determination of solid fat content. Pulsed nuclear magnetic resonance method.

Table of contents

Avant-propos
iv
1 Domaine d'application
1
2 Références normatives
1
3 Termes et définitions
1
4 Symboles et termes abrégés
2
5 Principe
2
6 Échantillon étalon de trioléine
2
7 Appareillage
2
8 Échantillonnage
4
9 Mode opératoire
4
9.1 Protocole de mesurage
4
9.2 Four, bains d'eau et blocs régulés en température
4
9.3 Spectromètre RMN
4
9.4 Remplissage des tubes de mesurage
6
9.5 Élimination de l'historique thermique
6
9.6 Équilibrage à la température initiale et mesurage du signal liquide à 100 %
6
9.7 Cristallisation et tempérage
6
9.8 Mesurage de SFC
6
9.9 Nombre de déterminations
7
9.10 Nettoyage des tubes de mesurage
7
10 Expression des résultats
8
11 Fidélité
8
11.1 Essais interlaboratoires
8
11.2 Répétabilité
8
11.3 Reproductibilité
8
12 Rapport d'essai
9
Annexe A (informative) Résultats d'essais interlaboratoires
10
Annexe B (informative) Théorie de la méthode indirecte
13
Annexe C (informative) Protocoles de mesurage supplémentaires
15
Bibliographie
17

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