Safavi A, Ensafi A A, Massoumi A
Department of Chemistry, Faculty of Sciences, Shiraz University, Shiraz, Iran.
Talanta. 1991 Feb;38(2):229-31. doi: 10.1016/0039-9140(91)80135-m.
The reaction between nickel and ammonium 2-amino-1-cyclohexene-1-dithiocarboate in aqueous acetone medium at pH 3.0-8.0 results in a stable dark red complex. The ratio of reagent to nickel in the complex is 2:1 and the formation constant is 7.38 +/- 0.12 x 10(10). Beer's law is obeyed up to 4 microg/ml nickel at the absorption maximum at 535 nm. The apparent molar absorptivity is 2.8 x 10(4) l.mole(-1). cm(-1), and the detection limit is 10 ng/ml nickel. The method is applied to the determination of nickel in vegetable oil.
镍与2-氨基-1-环己烯-1-二硫代碳酸铵在pH值为3.0 - 8.0的丙酮水溶液介质中反应，生成一种稳定的深红色络合物。该络合物中试剂与镍的比例为2:1，形成常数为7.38 ± 0.12×10(10)。在535 nm处的吸收最大值下，镍含量高达4 μg/ml时符合比尔定律。表观摩尔吸光率为2.8×10(4) l·mol(-1)·cm(-1)，检测限为10 ng/ml镍。该方法用于植物油中镍的测定。
