This document specifies 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 document 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.
EN ISO 18218-2:2019 history
2019EN ISO 18218-2:2019 Leather - Determination of ethoxylated alkylphenols - Part 2: Indirect method
2015EN ISO 18218-2:2015 Leather - Determination of ethoxylated alkylphenols - Part 2: Indirect method (ISO 18218-2:2015)