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%。
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.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
1997年第4期65-67,共3页
Ordnance Material Science and Engineering
关键词
铬
铜铬合金
硫酸亚铁铵滴定
测定
chromium, copper-chromium alloy, rapid dissolution, titrimetry Correspondent: Wu Yanqing, Physical and Chemical Lab, P. O. Box 5, Xian 710043