GB/T 23943-2009 in English

《GB/T 23943-2009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》由TC63（全国化学标准化技术委员会）归口，TC63SC1（全国化学标准化技术委员会无机化工分会）执行，主管部门为中国石油和化学工业联合会。
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)。

Scope

This standard specifies the general method for the determination of hexavalent chromium in inorganic chemical products - the principle of diphenylcarbazide spectrophotometry, safety tips, general regulations, reagents, instruments, equipment, analysis procedures and result calculations. This standard is applicable to the determination of hexavalent chromium ions in inorganic chemical products. The hexavalent chromium ion (Cr) is linear in the range of 0.004mg/L~1.000mg/L. The volume of the test solution is 50mL, using a cuvette with an optical path length of 3cm, the minimum detection amount of this method is 0.2μg hexavalent flower chromium, and the minimum detection concentration is 0.004mg/L; use a colorimetric cuvette with an optical path length of 1cm Dish, the upper limit concentration of determination is 1.000mg/L (see Appendix A for ions that do not interfere with the determination).