Lëkurë -Përcaktimi i përmbajtjes kimike të oksidit të kromit -Pjesa 4 : Përcaktimi sasior i plazmës në çiftimin me kapje direkt -Spektrometri i emetimeve optike (ICP -OES) (ISO 5398 -4 : 2007)

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

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ISO 5398-4:2007 describes a method for the determination of chromium in aqueous solution obtained from leather. This is an analysis for total chromium in leather; it is not compound specific or specific to its oxidation state. This method describes the determination of chromium by inductively coupled plasma – optical emission spectrometry and is applicable to leathers which are expected to have chromic oxide contents in excess of 1 mg/kg. Two techniques for the preparation of the solution to be analysed are included. In the case of dispute, the wet oxidation technique is to be used.