ISO 18218-2:2015是在皮革和工艺助剂中测定烷基酚（壬基酚和辛基苯酚）和烷基酚乙氧基化物（壬基酚乙氧基化物和辛基酚乙氧基化物）的方法。分析基于高效液相色谱（HPLC）或气相色谱 - 质谱（GC-MS）。 烷基酚乙氧基化物的分析通过裂解烷基酚乙氧基化物并测量释放的烷基酚来制备。 注意ISO 18218-1和ISO 18218的这一部分使用不同的溶剂从皮革中提取乙氧基化烷基酚。因此，预期两种分析方法给出类似的趋势，但对皮革中乙氧基化烷基酚含量的绝对结果不一定相同

ISO 18218-2:2015 is a method for determining alkylphenols (nonylphenol and octylphenol) and alkylphenol ethoxylates (nonylphenol ethoxylate and octylphenol ethoxylate) in leather and process auxiliaries. The analysis is based on high-performance liquid chromatography (HPLC) or gas chromatography-mass spectrometry (GC-MS). The analysis of the alkylphenol ethoxylate is made by cleaving the alkylphenol ethoxylate and measuring the released alkylphenol. NOTE ISO 18218‑1 and this part of ISO 18218 use different solvents for the extraction of the ethoxylated alkylphenols from leather. Consequently, the two analytical methods are expected to give similar trends but not necessarily the same absolute result for the ethoxylated alkylphenol content in leather.