标准摘要
[中文适用范围]： ISO 8292 的本部分规定了一种使用低分辨率脉冲核磁共振 (NMR) 波谱法测定动物和植物脂肪和油（以下称为“脂肪”）中固体脂肪含量的间接方法。规定了两种替代热预处理方法：一种用于不表现出明显多态性且主要稳定在 β′-多态性的通用脂肪；一种用于表现出明显多态性并稳定在 β-多态性的类似可可脂的脂肪。在资料性附件中给出了可能更适合特定用途的其他热预处理方法。间接法比直接法更难实施且可重复性较差，但更准确且更普遍适用于所有脂肪。注：ISO 8292-1 中规定了一种直接法。 [外文原描述]： 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.
英文名称Animal and vegetable fats and oils — Determination of solid fat content by pulsed NMR — Part 2: Indirect method