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近年来,有用原子吸收法测定矿石中微量铟,但方法的灵敏度以及干扰元素的消除等问题,有待进一步改进。本试验在H_2SO_4-KBr介质中,以甲基异丙基甲酮萃取分离铟,并应用柠檬酸、酒石酸-抗坏血酸和硫脲掩蔽铁、铜、锌、铬等等干扰元素,使方法的灵敏度和选择性有所提高,应用于矿石、岩石中锢的测定(含铟量为0.0000x—0.x％),获得较好的结果。本法的灵敏度为0.2ppm/1％,回收
In recent years, the use of atomic absorption spectrometry for the determination of trace indium ore, but the sensitivity of the method and the elimination of interference elements and other issues to be further improved. In this experiment, H 2 SO 4 -KBr medium was extracted with methyl isopropyl ketone, and indium was separated by masking iron, copper, zinc, chromium and so on with citric acid, tartaric acid-ascorbic acid and thiourea to make the sensitivity and Selectivity has increased, used in ores, rocks in the determination (indium content of 0.0000x-0.x%), get better results. The sensitivity of this law is 0.2ppm / 1%, recovery