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镓是一种稀散元素,岩石矿物中的含量一般都很低。空气-乙炔火焰原子吸收测定镓,灵敏度低,手续繁多。近年来,氧屏蔽空气-乙炔火焰在原子吸收分析中应用,部分元素的灵敏度有较大提高。本文将这种火焰用于铁矿石中镓的原子吸收测定。低含量经萃取分离浓缩后喷雾有机相,高含量直接喷洒水溶液可以测定0.001％以上的镓。该方法简便快速,分析结果有较好的重现性和准确度。
Gallium is a sparsely dispersed element, and the content in rock minerals is generally low. Air - acetylene flame atomic absorption determination of gallium, low sensitivity, procedures. In recent years, oxygen shielding air - acetylene flame atomic absorption analysis, some of the elements have greatly increased the sensitivity. This article uses this flame for the determination of gallium in iron ore by atomic absorption spectrometry. The low content is extracted and concentrated, and the organic phase is sprayed and concentrated. The high content of direct spraying aqueous solution can measure more than 0.001% gallium. The method is simple and fast, the analysis results have better reproducibility and accuracy.