本文件规定了皮革中游离甲醛和释放甲醛的测定方法。该方法基于高效液相色谱法（HPLC），具有选择性，对有色提取物不敏感，旨在用于甲醛的精确定量。 甲醛含量是指在标准使用条件下，通过水解从皮革水提取物中提取的游离甲醛和甲醛的含量。

This document specifies a method for the determination of free and released formaldehyde in leathers. This method, based on high-performance liquid chromatography (HPLC), is selective and not sensitive to coloured extracts and is intended to be used for precise quantification of formaldehyde. The formaldehyde content is taken to be the quantity of free formaldehyde and formaldehyde extracted through hydrolysis contained in a water extract from the leather under standard conditions of use.