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砷是地球化学探矿工作中很重要的远程指示元素之一。由于其在岩石、土壤中的含量比较低,克拉克值为n×10~(-4)％,而且化探分析样品数量很大,因此,要求分析的方法必须是灵敏度高、手续简便、快速。 以往采用化学方法,测定砷,无论灵敏度还是速度都不能满足化探的要求。近年来,文献,报导了气相氢化物发生石英管加热原子吸收法测定微量砷,这些方法灵敏度比较
Arsenic is one of the most important remote indicator elements in geochemical prospecting. Due to its low content in rock and soil, the Clarke value is n × 10 ~ (-4)%, and the number of geochemical analysis samples is very large. Therefore, the method of analysis required must be highly sensitive and simple and rapid. In the past using chemical methods to determine arsenic, both sensitivity and speed can not meet the requirements of geochemical exploration. In recent years, literature, reported the occurrence of gas phase hydride quartz tube heating atomic absorption spectrometry for the determination of trace arsenic, the sensitivity of these methods