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Chinese National Standard Category: Steel and iron alloy analysis method

English Title: Zinc or zinc alloy coating on steel sheets or strips―Determination of hexavalent chromium content―1,5-Diphenylcarbohydrazide(diphenylcarbazide) spectrophotometric method
Chinese Title: 钢板及钢带 锌及锌合金镀层中六价铬含量的测定 二苯碳酰二肼分光光度法
Standard No.: GB/T 31931-2015
Category No.: H11
Issued by: AQSIQ, SAC
Issued on: 2015-09-11
Implemented on: 2016-6-1
Status: valid
Superseded by:
Superseded on:
Abolished on:
Superseding:
Word Count:3500 words
Similar Standards: GB 4333.5-1984   GB/T 7730.5-2000   GB/T 7731.16-1999   GB/T 4333.9-1988   GB/T 7730.2-2002   GB/T 7730.8-2000   GB/T 8704.3-1997   GB 4010-1983   GB 7730.6-1988   GB/T 8704.9-1994   GB 7731.3-1987   GB/T 5687.5-1988   GB/T 5686.9-2023   GB/T 3654.8-2023   GB/T 7731.17-2023   GB/T 5686.5-2023   GB/T 3653.3-2023   GB/T 223.92-2023   GB/T 4333.2-2023   GB/T 42794-2023  
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