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在分光光度分析中,用高碘酸钾显色分别测定铜和银已有报道。但用高碘酸钾显色同时测定铅合金中铜和银尚未见报道。本文研究了用高碘酸钾分光光度法同时测定铅合金中铜和银的试验条件,通过巯基棉同时分离出铅合金中的铜和银,而消除其他干扰元素,测其铜银的回收率各为95.0％～104.0％、90.0％～102.0％,相对标准偏差各为2.3％～3.8％、1.1％～1.7％。实验部分一、主要仪器与试剂 721型分光光度计(上海第三分析仪器厂) 铜银标准溶液:称取99％的金属铜
In spectrophotometric analysis, the determination of copper and silver respectively by potassium periodate colorimetry has been reported. However, the simultaneous determination of copper and silver in lead alloys by potassium periodate has not been reported. In this paper, potassium iodate spectrophotometric simultaneous determination of copper and silver in lead alloy test conditions, simultaneous removal of copper and silver in the lead alloy through the sulfhydryl cotton, and to eliminate other interfering elements measured copper and silver recovery The relative standard deviations (RSDs) ranged from 95% to 104.0% and from 90.0% to 102.0% with relative standard deviations of 2.3% -3.8% and 1.1% -1.7%, respectively. Experimental part A, the main instruments and reagents 721 spectrophotometer (Shanghai Third Analytical Instrument Factory) copper and silver standard solution: Weigh 99% of the metal copper