摘要
研究了新显色剂2 - 〔2 - (6 - 甲基苯并噻唑) 偶氮〕- 5 - 二乙氨基苯甲酸与钯的显色反应, 实验表明, 在pH=470 缓冲溶液中, 该试剂与钯反应生成一稳定络合物, 其最大吸收波长为705 nm , 表观摩尔吸光系数为327 ×104 L·mol- 1cm - 1 。钯含量在(0 ~60) μg/25m L 范围内符合比尔定律, 该方法应用于分子筛和铜镍合金中钯的测定, 获得满意结果。
The colour reaction of Palladium(Ⅱ) with 2-〔2-(6-Methylbenzothiazolyl)azo〕-5-diethylminobenzoic Acid(6-Me-BTAEB) was studied.In the pH=4 70 buffer medium,the reagent reacts with Palladium(Ⅱ) to form a stable complex,and the maxium absorption of the complex lies at 705nm.The apparent molar absorptivity of the complex is 3 27×10 4L·mol -1 cm -1 .Beer's law is obeyed in the range of 0 to 60μg/25mL for palladium(Ⅱ). The method is highly selective and sensitive and can be applied to the direct determination of trace palladium(Ⅱ) in molecular sieve ,Cu-Ni alloys with satisfactory results.
出处
《江苏石油化工学院学报》
1999年第2期42-44,共3页
Journal of Jiangsu Institute of Petrochemical Technology