| 铜铬合金中铬的滴定法测定 |
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| 引用本文： | 吴岩青 郭润秀. 铜铬合金中铬的滴定法测定[J]. 兵器材料科学与工程, 1997, 20(4): 65-67 |
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| 作者姓名： | 吴岩青 郭润秀 |
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| 作者单位： | [1]兵器工业西北理化检测中心 [2]西安秦川机械厂 |
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| 摘 要： | 提出用盐酸－硝酸混合酸（１０＋３）和硫酸－磷酸混合酸（１０＋５）冒烟快速溶解铜铬合金样品，在０．９０ｍｏｌ·Ｌ－１的硫酸和０．３７ｍｏｌ·Ｌ－１的磷酸介质中，用硫酸亚铁铵滴定法测定铬。经人工合成试样和实际试样测定验证，该法结果可靠，回收率大于９９．９％。
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| 关 键 词： | 铬 铜铬合金 快速溶解 硫酸亚铁铵滴定 |
TITRIMETRIC DETERMINATION OF CHROMIUM IN COPPER-CHROMIUM ALLOY |
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| Wu Yanqing,Guo Runxiu. TITRIMETRIC DETERMINATION OF CHROMIUM IN COPPER-CHROMIUM ALLOY[J]. Ordnance Material Science and Engineering, 1997, 20(4): 65-67 |
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| Authors: | Wu Yanqing Guo Runxiu |
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| Abstract: | The sample of copper-chromiun alloy was dissolved rapidly by HCl-HNO 3 mixed acid and then H 2SO 4-H 3PO 4 mixed acid under smoking. In medias of 0.90mol·L -1 H 2SO 4 and 0.37mol·L -1 H 3PO 4,the chromium in alloy was determined by (NH 4) 2Fe(SO 4) 2 titrimetry. Accuracy and precision is very good. |
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| Keywords: | chromium copper-chromium alloy rapid dissolution titrimetry Correspondent: Wu Yanqing Physical and Chemical Lab P. O. Box 5 Xian 710043 |
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