【作者】 王文革； 李舒婷； 刘典梅； 赵书林；

【Author】 WANG Wen-ge, LI Shu-ting, LIU Dian-mei, ZHAO Shu-lin(Department of Chemistry and Chemical Engineering,Guangxi Normal University .Guilin 541004,China)

【机构】 广西师范大学化学化工系；

【摘要】 研究了新试剂5-（4-甲酰基苯偶氮）-8-氨基喹啉与镍的显色反应。在pH10.2的硼砂-NaOH缓冲介质中,溴化十六烷基三甲基铵存在下,试剂与镍形成2:1的蓝色络合物,最大吸收波长位于630 nm,表观摩尔吸光系数为1.43×10⁵L·mol^-1·cm^-1,镍量在0～240 μg/L范围内,符合比尔定律。应用于铝合金中镍含量的测定,结果满意。更多还原

【Abstract】 A highly sensitive chromogenic reaction of 5-(4-formylphenylazo)-8-aminoquinoline (FPAAQ) with nickel is studied. In the presence of cetyltrimethylammonium bromide and borax buffer solution, nickel forms a blue complex with FPAAQ which has an absorption maximum at 630 nm. The apparent molar absorptivity is 1. 43×105 L · mol-1 ·cm-1. Beer’s law is obeyed for nickel in the concentration ranging 0-240 μg/L. Trace amounts of nickel in aluminium alloy bas been determined by the method.更多还原