ISO 8292-1-2008
动物和植物的脂肪和油.用脉冲NMR测定固体脂肪含量.第1部分:直接法
Animal and vegetable fats and oils - Determination of solid fat content by pulsed NMR - Part 1: Direct method
- 标准号
- ISO 8292-1-2008
- 发布日期
- 2008年04月
- 实施日期
- 废止日期
- 无
- 中国标准分类号
- X14
- 国际标准分类号
- 67.200.10
- 发布单位
- IX-ISO
- 引用标准
- ISO 661 ISO 8292-2
- 被代替标准
- ISO 8292-1991 ISO/FDIS 8292-1-2007
- 适用范围
- This part of ISO 8292 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 (NMR) 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. NOTE An indirect method is specified in ISO 8292-2.