NF EN ISO 8292-1

NF EN ISO 8292-1

July 2010
Standard Current

Animal and vegetable fats and oils - Determination of solid fat content by pulsed NMR - Part 1 : direct method

ISO 8292-1:2008 specifies a direct method for the determination of 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 direct method is easy to carry out and is reproducible, but is not as accurate as the indirect method due to the approximate method of calculation.

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Main informations

Collections

National standards and national normative documents

Publication date

July 2010

Number of pages

23 p.

Reference

NF EN ISO 8292-1

ICS Codes

67.200.10   Animal and vegetable fats and oils

Classification index

T60-250-1

Print number

1 - 30/06/2010

International kinship

ISO 8292-1:2008

European kinship

EN ISO 8292-1:2010
Sumary
Animal and vegetable fats and oils - Determination of solid fat content by pulsed NMR - Part 1 : direct method

ISO 8292-1:2008 specifies a direct method for the determination of 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 direct method is easy to carry out and is reproducible, but is not as accurate as the indirect method due to the approximate method of calculation.

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 abréviations
    2
  • 5 Principe
    3
  • 6 Appareillage
    3
  • 6.1 Spectromètre de résonance magnétique nucléaire (RMN) pulsé, basse résolution
    3
  • 6.2 Tubes
    4
  • 6.3 Matériel de régulation de température
    4
  • 6.4 Four, avec ventilateur
    5
  • 6.5 Minuteur de laboratoire
    5
  • 7 Échantillonnage
    5
  • 8 Mode opératoire
    5
  • 8.1 Protocole de mesurage
    5
  • 8.2 Four, bains d'eau et blocs régulés en température
    7
  • 8.3 Détermination du facteur de conversion (si nécessaire)
    7
  • 8.4 Spectromètre RMN
    8
  • 8.5 Remplissage des tubes de mesurage
    8
  • 8.6 Élimination de l'historique thermique
    8
  • 8.7 Équilibrage à la température initiale
    9
  • 8.8 Cristallisation et tempérage
    9
  • 8.9 Mesurage de SFC
    9
  • 8.10 Nombre de déterminations
    10
  • 8.11 Nettoyage des tubes de mesurage
    10
  • 9 Expression des résultats
    10
  • 10 Fidélité
    11
  • 10.1 Essais interlaboratoires
    11
  • 10.2 Répétabilité
    11
  • 10.3 Reproductibilité
    11
  • 11 Rapport d'essai
    12
  • Annexe A (informative) Résultats d'essais interlaboratoires
    13
  • Annexe B (informative) Théorie de la méthode directe
    24
  • Annexe C (informative) Protocoles de mesurage supplémentaires
    26
  • Bibliographie
    28
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