DIN EN ISO 5398-4:2017
皮革 氧化铬含量的化学测定 第4部分:电感耦合等离子体定量 光发射光谱仪(ICP-OES)(ISO/DIS 5398-4:2017)
Leather - Chemical determination of chromic oxide content - Part 4: Quantification by inductively coupled plasma - optical emission spectrometer (ICP-OES) (ISO/DIS 5398-4:2017); German and English version prEN ISO 5398-4:2017