Standard No.:	GB/T 23943-2009
English Name:	Inorganic chemicals for industrial use—General method for the determination of chromium(Ⅵ) content—1 5-Diphenylcarbohydrazide spectrophotometric method
Chinese Name:	无机化工产品中六价铬含量测定的通用方法 二苯碳酰二肼分光光度法
Chinese Classification:	G10    Inorganic chemicals in general
Professional Classification:	GB    National Standard
ICS Classification:	71.060.01 71.060.01    Inorganic chemicals in general 71.060.01
Issued by:	CPCIA
Issued on:	2009-6-2
Implemented on:	2010-2-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	6000 words
Price(USD):	140.00
Delivery:	via email in 1~3 business day

本标准规定了无机化工产品中六价铬含量测定的通用方法---二苯碳酰二肼分光光度法的原理、安全提示、一般规定、试剂、仪器、设备、分析步骤和结果计算。
本标准适用于无机化工产品中微量六价铬离子的测定,六价铬离子(Cr6+ )在0.004 mg/L~1.000mg/L 范围内呈线性关系。试验溶液体积为50mL,使用光程长为3cm 的比色皿,本方法的最小检出量为0.2μg六价铬,最低检出浓度为0.004 mg/L;使用光程为1cm 的比色皿,测定上限浓度为1.000mg/L (不干扰测定的离子参见附录A)。