摘要
在酸性溶液中高锰酸可氧化甲基橙褪色,褪色程度与锰含量呈线性关系,锰在0-25μg内符合朗伯-比尔定律。从而可用分光光度法测定锰的含量。其灵敏度为ε500=2.7×10^4,比高锰酸盐分光光度法高100倍。本文试验了该法测定条件及干扰元素允许量,并用该法测定了铁矿石、硅质、镁质、铝质等耐火材料中氧化锰,结果表明,对于氧化锰含量为0.014%的试样,测定结果的相对标准偏差为7.14%,标准样品比对结果满足允许差要求。
The Methyl orange may be oxidized and become fading in acid solution under the action of permanganate .The relationship between the fading degree and the manganese content is linear .Lambert-Beer＆#39;s law plays a role when the manganese content is 0-25μg.The manganese content may be deter-mined with the spectrophotometric method .The sensitivity isε500 =2.7 ×10^4 , which is 100 times of the permanganate spectrophotometric method .In this paper , the test condition and the allowed amount of the interference element is analyzed .The manganese oxide in the iron ores and the refractory materials such as siliceous , magnesium and aluminous materials is determined .As the result shows , for the sample of which the manganese oxide content is 0.014%, the RSD of the test result is 7.14%and the comparison result of the standard sample meets the tolerance requirement .
出处
《冶金丛刊》
2015年第2期33-35,共3页
Metallurgical Collections
关键词
甲基橙褪色
分光光度法
氧化锰
Methyl orange fading
Spectrophotometric method
Manganese oxide
