BS EN ISO 5398-4:2007 Leather. Chemical determination of chromic oxide content. Quantification by inductive coupled plasma-optical emission spectrometer (ICP-OES)
2019BS EN ISO 5398-4:2019 Leather. Chemical determination of chromic oxide content. Quantification by inductively coupled plasma (ICP)
2007BS EN ISO 5398-4:2007 Leather. Chemical determination of chromic oxide content. Quantification by inductive coupled plasma-optical emission spectrometer (ICP-OES)