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本文以动态法为基础研究了H_2SO_4-NaBr体系P_(350)萃取色谱分离Ga-In和Tl的色谱行为,并探索了影响分离的各种因素。首次提出P_(350)萃取色谱连续分离Ga、In和Tl的新途径。拟定了岩石、矿物中痕量Ga、In和Tl全差示吸光度法检测条件。 本法Ga、In和Tl的定量测定下限分别为0.05、0.11和0.09ppm;含量区间Ga在0.05—3ppm范围,RSD为4—9％;In在0.1—5ppm范围,RSD在6—21％;Tl在0.1—3ppm范围,RSD为6—16％。用拟定
In this paper, the chromatographic behavior of Ga-In and Tl separated by P_ (350) extraction in H_2SO_4-NaBr system was studied based on the dynamic method. Various factors influencing the separation were explored. For the first time, a new method for continuous separation of Ga, In and Tl by P_ (350) extraction chromatography was proposed. The conditions for the determination of trace amounts of Ga, In and Tl by differential scanning calorimetry in rock and mineral have been proposed. The lower limit of determination of Ga, In and Tl in this method are respectively 0.05, 0.11 and 0.09ppm; the content interval Ga is in the range of 0.05-3ppm, the RSD is 4-9%; the range of In is 0.1-5ppm, the RSD is 6-21% The Tl is in the 0.1-3 ppm range and the RSD is 6-16%. With the proposed