感应耦合等离子体中原子发射光谱的非局部热平衡（Ⅱ）──非沙哈电离平衡过程

Abstract

感应耦合等离子体中原子发射光谱的非局部热平衡（Ⅱ）──非沙哈电离平衡过程杨原，王小如，应海，王志勇（厦门大学化学系近代分析化学研究所，厦门，361005）关键词ICP-AES，非沙哈电离平衡，双极扩散过程实验已经证实用于原子发射光谱（AES）的感应耦...

Three parameters have been introduced to modiFy the Saha ionization equilibrium in a spectrochemical ICP.These parameters provide the necessary modiFications For the temperature diFFerence between heavier particles and electrons, For the emission From an opticalthin ICP, and For the ambipolar diFFusion of ion-electron pairs, respectively.It is conFirmed that the overpopulation of electron number density in the central channel of ICP is mainly caused by the ambipolar diFFusion process.As a consequence, this process enhances the charge exchange process between argon ions and analyte atoms in the central channel,which is principally responsible For the overpopulated analyte ion number density.