GB/T 4702.7-1984 Methods for chemical analysis of chromium metal--The atomic absorption spectrophotometric method for the determination of iron content (English Version)
This standard applies to the determination of the amount of iron in metallic chromium. Measuring range: less than 1.00%.
GB/T 4702.7-1984 history
2016GB/T 4702.7-2016 Chromium metal.Determination of nitrogen content.Distillation-nessler reagent spectrophotometric method
2008GB/T 4702.4-2008 Chromium metal. Determination of iron content. EDTA titrimetric method and flame atomic absorption spectrometric method
1984GB/T 4702.7-1984 Methods for chemical analysis of chromium metal--The atomic absorption spectrophotometric method for the determination of iron content
GB/T 4702.7-1984 Methods for chemical analysis of chromium metal--The atomic absorption spectrophotometric method for the determination of iron content was changed to GB/T 4702.4-2008 Chromium metal. Determination of iron content. EDTA titrimetric method and flame atomic absorption spectrometric method.