Standard No.:	SN/T 2004.3-2005
English Name:	Determination of Chromium(VI) in electrical and electronic equipment - Part 3: 1 5-Diphenylcarbohydrazide spectrophotometric method
Chinese Name:	电子电气产品中六价铬的测定 第3部分:二苯碳酰二肼分光光度法
Chinese Classification:	L04    Basic standards and general methods
Professional Classification:	SN    Professional Standard - Import&Export Inspection
ICS Classification:	31.02 31.02    Integrated circuits. Microelectronics 31.02
Issued by:	AQSIQ
Issued on:	2005-7-18
Implemented on:	2006-1-18
Status:	abolished
Abolished on:	2017-12-22
Language:	English
File Format:	PDF
Word Count:	1500 words
Price(USD):	184.0
Delivery:	via email in 1 business day

1 Scope This part specifies the 1.5-diphenylcarbahydrazide spectrophotometric determination method for chromium (VI) in electrical and electronic equipment. This part is applicable to determination of chromium (VI) in electrical and electronic equipment. 2 Method Summary The water-soluble or water-insoluble chromium (VI) compound is leached from the sample by alkaline leach liquor; the chromium (VI) in leach liquor react with 1.5-diphenylcarbahydrazide in acid solution and generate claret-colored complex, then spectrophotometric determination is carried out where the wavelength is 540nm. 3 Reagents and Materials

Foreword I 1 Scope 2 Method Summary 3 Reagents and Materials 4 Equipment 5 Analysis Procedures