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本文报道了一个测定地质物料中微量W和Mo(含量这为0.5—100μg g~(-1))的实用而有效的方法。样品用碱(碳酸钠-硝酸钠)熔融分解,用水浸取熔块,W和Mo以含氧阴离子的形式溶于水中。分离和富集是采用活性碳选择性吸附待测元素的8-羟基喹啉化合物,并将活性碳灰化,然后用酸溶解金属。最终的溶液用电感耦等离子光谱进行分析。通过分析22个国际参考样品,证明应用该法可以测定含量低至0.4μg g~(-1)的W和0.2μg g~(_1)的Mo。
This paper reports a practical and efficient method for the determination of trace amounts of W and Mo in geological materials (0.5-100 μg g -1). The sample was melted and decomposed with an alkali (sodium carbonate-sodium nitrate), the frit was leached with water, and W and Mo were dissolved in water as oxygen-containing anions. Separation and enrichment is the use of activated carbon selective adsorption of the element to be measured 8-hydroxyquinoline compounds, and activated carbon ashing, and then acid dissolved metal. The final solution was analyzed by inductively coupled plasma spectroscopy. By analyzing 22 international reference samples, it is proved that the method can be used to determine W content as low as 0.4μg g -1 and Mo 0.2μg g -1.