摘要
本文研究了2-[2-(6-甲基苯并噻唑)偶氮]-5-二甲氨基苯甲酸(简称MBTAMB)与镍(Ⅱ)离子的显色反应。实验表明,该试剂与镍(Ⅱ)反应生成2∶1 水溶性络合物。在表面活性剂TritonX-100存在下,此络合物可稳定24 h,其最大吸收波长为651 nm ,表观摩尔吸光系数为1.42×105 L·m ol- 1 ·cm - 1 ,镍量在0～10 μg/25m L范围内符合比尔定律。本法是测定痕量镍(Ⅱ)的灵敏度较高的方法之一,并且显色体系简单,便于操作。应用于电镀液中镍含量的测定,结果令人满意。
methy\|benzothiazolyl)azo\]\|5\|dimethylaminobenzoic acid has been synthesized and employed a new reagent for the spectrophotometric determination of nickel. A blue complex is formed from MBTAMB and Ni(Ⅱ) in the range of pH 5.0～8.2 in the presence of TritonX\|100 aqueous solution. The composition of the complex is Ni(Ⅱ) ∶MBTAMB=1∶2 ,The maximum absorption of the complex is at 651 nm, its apparent molar absorptivity is 1.42×10\+5 L\5mol\+\{-1\}\5cm\+\{-1\}.Beer’s Law is obeyed for nickel in the range of 0～0.4μg/mL, The method has been applied for the determination of trace amount of nickel in electroplating waste water with satisfactory results. The proposed method is simple, rapid and accurate.
出处
《浙江师大学报（自然科学版）》
1999年第2期70-73,共4页
Journal of Zhejiang Normal University(Natoral Sciences)
关键词
二甲氨基苯甲酸
镍
分光光度法
MBTAMB
methy1\|benzothiazolyl)azo\]\|5\|dimethylaminobenzoic acid
nickel
spectrophotometry
