分光光度法测定Fe-Ni-Cr三元合金镀层中的铬

Determination of Chromium in Fe-Ni-Cr Alloys Plating Layer by Spectrophotometry

本文研究了二苯羰酰二肼(DPC)光度法测定铁-镍-铬三元合金镀层中铬含量的方法。在对显色条件、共存离子干扰等研究基础上,进行了相关指标的测定。该方法灵敏度为4.02×104L·mol-1.cm-1,铬的质量浓度在0.0～80μg/50mL范围内服从比尔定律。经用于样品分析,结果满意。

A spectriphotometric determination of the chromium content in Fe-Ni-Cr alloys has been developed by using Cr-DPC system.The reaction sensitivity was 4.02×10^4 L·mol-1.cm-1. Beer s law is obeyed in the chromium of 0.0～80 μg/50mL.Thesampleanalysisresultsmeettherequirement.