高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (11): 2157.doi: 10.7503/cjcu20150598

• 研究快报 • 上一篇    下一篇

一种原子光谱分析用新激发光源——千瓦级微波等离子体炬(kW-MPT)

金伟(), 于丙文, 朱旦, 应仰威, 于海翔, 金钦汉   

  1. 浙江大学控制科学与工程学院, 智能系统与控制研究所, 分析仪器研究中心, 杭州310058
  • 收稿日期:2015-07-31 出版日期:2015-11-10 发布日期:2015-09-18
  • 作者简介:联系人简介: 金 伟, 男, 博士, 高级工程师, 主要从事分析仪器研究. E-mail:jinweimy@zju.edu.cn
  • 基金资助:
    国家重大科学仪器设备开发专项(批准号: 2013YQ470781)资助

Development of a New Kilowatt Microwave Plasma Torch(kW-MPT) Excitation Source for Atomic Emission Spectrometry

JIN Wei*(), YU Bingwen, ZHU Dan, YING Yangwei, YU Haixiang, JIN Qinhan   

  1. Research Center for Analytical Instrumentation, Institute of Cyber Systems and Control,College of Control Science and Engineering, Zhejiang University, Hangzhou 310058, China
  • Received:2015-07-31 Online:2015-11-10 Published:2015-09-18
  • Contact: JIN Wei E-mail:jinweimy@zju.edu.cn
  • Supported by:
    † Supported by the National Key Foundation for Exploring Scientific Instrument of China(No.2013YQ470781)

关键词: 千瓦级微波等离子体炬, 双谐振结构炬管, 原子发射光谱

Abstract:

Based on the simulation of transmission and distribution characteristics of the electromagnetic field inmicrowave plasma torch(MPT) torches with different configurations using electromagnetic simulation software and experimental study, a new MPT torch with double resonant configuration was, for the first time, developed. The results show that the inner tube of MPT torch plays an important role in strengthening the electric field intensity at the open end of the MPT torch and redistributing the electromagnetic field in the whole torch by the formation of the double resonance. It contributes also to enhance the macroscopic stability and the self-sustaining of the plasma. The stability of the plasma was shown to be excellent when the spacer between inner and intermediate tubes is located about 20—30 mm from the top opening of the torch. Preliminary study showed that the analytical performance for 13 common elements was approaching that of traditional ICP-AES.

Key words: Kilowatt microwave plasma torch, Double resonant configuration, Atomic emission spectrometry

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