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对于溶液中微量元素的测定,感耦等离子体是光学发射光谱的一种极好的光源。但目前为止,直接应用粉末试样进行分析的还较少。本文提出了一个新的粉末引入方法,即粉末样品可通过置于其上的两个电极间高能火花的反复作用,从中筛选(elutriation)出细粒引入等离子体。因为火花放电,使细粉末微粒得到筛选,粗颗粒进一步破碎而导致试样蒸发。
For the determination of trace elements in solution, the inductively coupled plasma is an excellent light source for optical emission spectroscopy. So far, however, there has been less analysis of direct application of powder samples. In this paper, a new powder introduction method is proposed, in which the powder sample can elute the fine particles into the plasma by the repeated action of high-energy spark placed between two electrodes placed thereon. Because of the spark discharge, the fine powder particles are screened and the coarse particles are further broken causing the sample to evaporate.