DIN EN ISO 17226-1-2017 皮革. 甲醛含量的化学测定. 第1部分：方法采用高效液相色谱法(ISO / DIS 17226 - 1:2017)；德文和英文版本prEN ISO 17226-1:2017
Leather - Chemical determination of formaldehyde content - Part 1: Method using high performance liquid chromatography (ISO/DIS 17226-1:2017); German and English version prEN ISO 17226-1:2017
This part of ISO 17226 specifies a method for determination of free and released formaldehyde in leathers. This method is based on High Performance Liquid Chromatography (HPLC). It is selective and not sensitive to coloured extracts. 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. When compared with ISO 17226-2, the two analytical methods should give similar trends but not necessarily the same absolute result. Therefore, in the case of dispute, this method (ISO 17226-1) shall be used in preference to ISO 17226-2.