摘要
合成了新的三氮烯试剂2 羟基4 磺酰氨基苯3 (4 硝基苯) 三氮烯(HSNPT) ,并研究了在TritonX 1 0 0表面活性剂存在下与镍的显色反应。在pH 1 0～1 2. 0的Na2 B4 O7 NaOH缓冲溶液中,试剂与镍形成配合比为3∶1型淡黄色配合物。配合物最大负吸收峰位于λ=5 40nm处,表观摩尔吸光系数1 .1 8×1 0 5L·mol- 1·cm- 1。Ni2 +的质量浓度在0～480 μg/L范围内符合比尔定律。用拟定方法测定合金钢样品中的微量镍,结果满意。
The 2-hydroxy-4-sulfamylbenzen-3-(4-nitrophenyl)-triazene(HSNPT)has been synthesized.The color reaction of HSNPT with nickel was investigated.At the presence of the surface active agent Triton X-100 and in a Na 2B 4O 7-NaOH medium of pH 10.0～12.0,HSNPT with Ni(Ⅱ)forms a yellow complex.The molar absorbtivity of the complex is ε =1.18×10 5 L·mol -1 ·cm -1 at the determination wavelength of 540 nm.The molar ratio of Ni(Ⅱ) to HSNPT is 1∶3.The Beer's law is well obeyed in the rang of 0～480 μg/L for nickel at the determination wavelength.This method has been applied to determine trace amounts of nickel in steels with satisfatory result.
出处
《广东微量元素科学》
CAS
2005年第2期58-61,共4页
Trace Elements Science
