【摘要】 在TritonX-100表面活性剂存在下,pH为10.0-11.0的Na2B4O7-NaOH缓冲溶液中,1-(6-硝基-2-苯并噻唑)-3-(4-硝基苯)-三氮烯(NBTNPT)与铜生成2:1配合物。配合物的最大负吸收峰是540nm,表观摩尔吸光系数为1.15×105L·mol-1·cm-1。Cu2+的质量浓度在0-360μg/L符合比耳定律。测定铝合金样品中的微量铜,结果满意。更多还原

【Abstract】 In the presence of the surface active agent Triton X-100 and in a Na2B4O7-NaOH medium of pH 10. 0-11. 5,1-(6-nitro-2-benzothiaz6lyl)-3-(4-nitrophenyl)-triazen(NBTNPT) with Cu(Ⅱ) forms a 2 :1 complex with the apparent molar absorbtivity of 1. 15×105L·mol-1·cm-1. Beer’s law is well obeyed in the range of 0-360μg/L for Cu(Ⅱ). This method was applied to the determination of trace amounts of copper in aluminium alloys with satisfactory results.更多还原