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合成了二安替比林苯基甲烷(DAPM),并研究在Mn(Ⅱ)存在的沸水浴条件下,二安替比林苯基甲烷分光光度法测定微量钯的最佳显色条件。研究结果表明,本体系最大吸收波长λmax=480nm,表观摩尔吸光系数ε=1.08×105 L·mol~(-1)·cm~(-1);在50m L溶液中,钯(Ⅱ)的质量浓度在0~0.3μg/m L范围内符合朗伯-比尔定律。该体系选择性好,稳定时间长。运用于样品中微量钯的测定,结果满意。
DAPM was synthesized and the best conditions for the determination of trace palladium with diantipyrylphenylmethane spectrophotometry were studied under boiling water bath with Mn (Ⅱ). The results showed that the maximum absorption wavelength of this system is λmax = 480nm, the apparent molar absorptivity ε = 1.08 × 105 L · mol -1 (-1) · cm -1. In 50m L solution, The mass concentration ranged from 0 to 0.3 μg / m L to Lambert-Beer’s law. The system has good selectivity and long stable time. Used in the determination of trace palladium in the sample, the results are satisfactory.