Advances in Microplasma Optical Emission Spectrometry

KeyWord:microplasma  excitation source  optical emission spectrometry  miniaturization  trace analysis  review

Abstract:

      Microplasma is produced by confining the dimension of plasma to a limited space.As a new type of excitation source£¬microplasma has the advantages of low power consumption£¬small size and low cost£¬and shows a great application potential in the miniaturization of optical emission spectrometric instruments.In this paper£¬the new applications of optical emission spectrometric£¨OES£©systems based on microplasma excitation sources in the field of analytical chemistry are introduced.At present£¬microplasma OES system is not only able to use in the direct determination of analytes in gas or liquid phase£¬but also possesses a series of coupling techniques with gas chromatography£¨GC£©£¬chemical vapor generation£¨CVG£©£¬electrothermal vaporization£¨ETV£©£¬microelectrodialysis£¨¦ÌED£©and capillary electrophoresis£¨CE£©£¬greatly expanding the scope of its application.In the future£¬the performance of the microplasma OES system will be further improved by enhancing the excitation capability of the microplasma itself and choosing a suitable sampling approach.At the same time£¬the development for related instruments will provide a reliable tool for the field analysis on trace elements.