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萃取分离测定同一样品中镓、铟和铊的工作,国内外近年来都有研究。本文在A.E.HuberT等工作的基础上提出,在氢溴酸介质中,以甲基异丁基甲酮(MIBK)为萃取剂,甲苯为稀释剂,调节水相酸度,分步萃取,有机相直接显色分光光度法测定同一样品浸提液中镓、铟和铊。该方法的特点是分步萃取后,有机相既不经反萃取也不经蒸干,直接用分光光度法进行测定,具有简便,准确的优点并成功地应用于矿样分析。 实验 1.仪器及试剂 721分光光度计(上海第三分析仪器厂) 氢溴酸 分析纯40％约为7mol/L(用时可进行标定)。
Extraction separation Determination of the same sample of gallium, indium and thallium work, both at home and abroad have been studied. Based on the work of AE HuberT et al., It is proposed that methyl isobutyl ketone (MIBK) as the extractant and toluene as the diluent in the hydrobromic acid medium regulate the acidity of the aqueous phase, fractional extraction, and direct color development of the organic phase Spectrophotometric determination of gallium, indium and thallium in the same sample extract. The method is characterized by a step-by-step extraction method. The organic phase is directly and spectrophotometrically determined without being back-extracted or evaporated to dryness. The method has the advantages of simplicity and accuracy and is successfully applied to the analysis of ore samples. Experiment 1. Instruments and reagents 721 spectrophotometer (Shanghai Third Analytical Instrument Factory) Analysis of pure hydrobromide 40% About 7mol / L (when used to be calibrated).