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《Analytical Laboratory》 1992-01
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The Simultaneous Determination of Copper and Iron in Alloys of Aluminium by Derivative Spectrophotometry

Sun Wentao(Institute of Corrosion and Protection of Metals, Academia Sinica, Shenyang 110015), Xiang Renying and Mao Hua ( College of Metallurgical Geology,Changchun 130021 )  
The 1st derivative spectrophotometric simultaneous determinations of copper and iron have been developed with 5- Br- PADAP as the chromogenic reagent. Copper and iron do not interfere each other when their concentration ratio is in the range of 1 /5~5/1. The determination range is l~20μg/25mL for Cu and 2~10μg/25mL for iron. The method has been used for the simultaneous determination of copper and iron in aluminium- based alloys. The analytical resuls obtained for standard reference samples are identical with the given values.
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