ISO 8292-1:2008规定了使用低分辨率脉冲核磁共振光谱法直接测定动植物脂肪和油（以下简称“脂肪”）中固体脂肪含量的方法。 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。 直接法操作简单，重现性好，但由于计算方法近似，不如间接法准确。

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.