等离子体质谱法的主要工作参数研究(Ⅰ)

A Study on The Main Operating Parameters Used in ICP-MS

本文研究了等离子体质谱(ICP-MS)技术的主要工作参数对多元素测定的影响。这些参数包括雾化气(载气)流量,RF功率和采样深度,它们对元素的单电荷、双电荷、氧化物、氢氧化物和其他多原子离子的形成产生很大作用。实验提供了所用PlasmaQuad等离子体质谱仪的最佳工作条件。全部实验所选用的元素跨越了整个质量范围,其物理、化学性质也有较大差异,因而具有充分的代表性。因此,本文所得到的结论在用ICP-MS方法进行多元素测定中也具有广泛的参考意义。

Some of the parameters affecting multielement determinations by ICP-MS have been studied on a VG PlasmaQuad ICP mass spectrometer. The nebulizer flow rate, the RF plasma power and the sampling depth were selected as the parameters for study, as they exert significant effects on the formation of singly and doubly charged ions, as well as oxide, hydroxide and other polyatomic ions. A set of optimized operating parameters has been obtained from the investigation. Efforts have been made that elements representative of all mass numbers and of very different physical and chemical properties were selected in the experiment, so the conclusions drawn should be expected to be useful for general reference.