DIN EN ISO 17234-2:2011
皮革皮革.测定染色皮革中某些偶氮着色剂的化学试验.第2部分:对氨基偶氮苯的测定(ISO 17234-2-2011);德文版本EN ISO 17234-2-2011
Leather - Chemical tests for the determination of certain azo colorants in dyed leathers - Part 2: Determination of 4-aminoazobenzene (ISO 17234-2:2011); German version EN ISO 17234-2:2011