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苯芴酮显色测定微量锡,采用溴化十六烷基三甲铵(CTMAB)胶束增溶光度法,已广泛用于各种物料的分析,该方法灵敏度比较高,克分子吸光系数达δ_(510)=1.63×10~5,锡含量0～30微克/50毫升符合比尔定律。但苯芴酮选择性比较差,能与多种金属离子形成络合物,故多采用分离测定法。本文在资料的基础上,在硫酸介质中应用酒石酸-柠檬酸作掩蔽剂,抗坏血酸作还原剂,草酸作催化剂,按拟定显色条件对铜合金中一般常见元素进行了
Benzofluorenone was used for the determination of trace tin. CTMAB micellar solubilization spectrophotometry has been widely used in the analysis of various materials. The sensitivity of the method is relatively high and the extinction coefficient of the molecule is δ_ (510) = 1.63 × 10 ~ 5, tin content of 0 ~ 30 μg / 50 ml is in accordance with Bill’s law. However, benzofluorenone selectivity is poor, with a variety of metal ions to form complexes, it is more to use separation assay. In this paper, based on the data, the use of tartaric acid - citric acid as a masking agent in sulfuric acid medium, ascorbic acid as a reducing agent, oxalic acid as a catalyst, according to the proposed color conditions of the common elements in the copper alloy