Determination of nickel with 2-(2-quinolylazo)-5-diethylaminoaniline as a chromogenic reagent.
A sensitive, selective and rapid method for the determination of nickel based on a rapid reaction of nickel(II) with 2-(2-quinolylazo)-5-diethylaminoaniline (QADEAA) has been developed. In the presence of pH = 6.0 ammonia-ammonium chloride buffer solution and sodium dodecyl sulfonate (SDS) medium, QADEAA reacts with nickel to form a violet complex having a molar ratio of 1:2 (nickel to QADEAA). The molar absorptivity of the complex is 1.38 x 10(5) l mol(-1) cm(-1) at 595 nm. Beer's law is obeyed in the range of 0.01-0.4 microg/ml. This method had been applied to the determination of nickel with good results.
Department of Chemistry, Yunnan University, Kunming, 650091, PR China. huqiufena@163.com
Qiufen
Q
Hu
Guangyu
G
Yang
Zhangjie
Z
Huang
Jiayuan
J
Yin
D002863:Chromogenic Compounds / Q000737:chemistry*; D005618:Fresh Water / Q000737:chemistry; D006197:Hair / Q000737:chemistry; D006801:Humans; D007202:Indicators and Reagents; D009532:Nickel / Q000032:analysis*; D013057:Spectrum Analysis; D013662:Tea / Q000737:chemistry
D002863:Chromogenic Compounds; D007202:Indicators and Reagents; D013662:Tea; D009532:Nickel