ISO 8292-2:2008 动物和植物的脂肪和油 脉冲核磁共振法测定固体脂肪含量 第2部分：间接法

标准编号：ISO 8292-2:2008

中文名称：动物和植物的脂肪和油 脉冲核磁共振法测定固体脂肪含量 第2部分：间接法

英文名称：Animal and vegetable fats and oils — Determination of solid fat content by pulsed NMR — Part 2: Indirect method

发布日期：2008-04

标准范围

ISO 8292-2:2008规定了使用低分辨率脉冲核磁共振光谱法测定动植物脂肪和油（以下简称“脂肪”）中固体脂肪含量的间接方法。规定了两种可供选择的热预处理方法:一种用于不表现出明显多态性且主要稳定在β′-多晶型中的通用脂肪；一种是类似可可脂的脂肪，表现出明显的多态性，并稳定在β-多晶型中。资料性附录中给出了可能更适合特定用途的附加热预处理。与直接法相比，间接法不太容易实施，重现性较差，但更准确，更普遍适用于所有脂肪。

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.

标准预览图