铜合金中微量锑的测定,以孔雀绿萃取光度法应用最为普遍〔1.2〕,该法虽灵敏,但难掌握,且分析手续繁琐,须将锑与主体元素及其他干扰元素分离。三价锑与碘离子在酸性溶液中形成黄色络合物 sbI4~-,这一反应灵敏度较低,宜于作为测定较高锑量的光度法,曾应用于锑镍青铜,锡茎轴承合金,铅茎轴承合金中常量锑的测定〔3.4〕。本厂生产的铸造青铜含锑0.1—0.6%左右,作者经试验拟定了用碘化钾光度法直接测定铜合金中0.05%以上微量锑的方法,灵敏度虽比孔雀绿萃取光度法低很多,但操作简便,快速,分析结果的准确度和 Determination of trace antimony in copper alloys, the most common use of malachite green extraction spectrophotometry 〔1.2〕, the method is sensitive, but difficult to grasp, and cumbersome analysis procedures, the main elements of antimony and other interference elements must be separated. Trivalent antimony and iodine ions in the acidic solution to form a yellow complex sbI4 ~ -, the reaction sensitivity is lower, suitable as a measure of the amount of higher antimony photometry, has been used in antimony nickel bronze, tin stem bearing alloy, Lead-bearing alloy Determination of constant antimony 〔3.4〕. The factory production of bronze containing antimony 0.1-0.6%, the author developed by the test potassium iodide photometric method for the direct determination of copper alloys more than 0.05% trace antimony method sensitivity than malachite green extraction spectrophotometric method is much lower, but easy to operate Quickly analyze the accuracy of the results and