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Study on High Power Microwave Induced Plasma Atomic Emission Spectrpmetry

高功率微波诱导等离子体原子发射光谱分析法研究

基本信息

批准号：
07455334
负责人：
NAKAHARA Taketoshi
金额：
$ 4.86万
依托单位：
Osaka Prefecture University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

This project has been performed over the last three years to establish a new system of high-power microwave-induced plasma (MIP)-atomic emission spectrometry (AES). The results are as follows.1. In this work, a new system of high-power MIP-AES has been designed and constructed as such an instrument is not available in the marketplace. It consists of a new type of resonant cavity and a computer-controlled spectrometer system for the multi-element determination.2. In contrast with a common low-power MIP,this high-power N_2 MIP can have a great tolerance to continuous nebulization of sample solutions. Furthermore, the constructed system has been modified to combine this MIP with a hydride generation technique as a highly efficient sample introduction.3. With the use of this newly-constructed MIP-AES system coupled with a conventional solution nebulization, background emission spectra have been measured. As a result, some typical molecular band emissions ascribed to OH,NH,N_2^+ and NO were … More observed in the spectral range of 200-400 nm. In addition, analytical characteristics of this high-power N_2 MIP were examined at 84 emission lines of 33 elements.4. For the sensitive determination of arsenic, antimony and selenium, their gaseous hydrides generated by the reaction with sodium tetrahydroborate were continuously conveyed into the MIP with no trouble. The hyphenated method has been successfully applied to the determination of arsenic, antimony or selenium in sea weeds (to be a candidate for a standard sample issued by National Institute of Environmental Studies, Japan), copper metals and steels with satisfactory results.5. For a future prospect of this project, a newly-developed high-power N_2 MIP-AES system should be more and more examined and applied to the much wider range of practical samples. If this system can be coupled with other analytical techniques, chemical speciation might be possible and useful, for example, in environmental chemistry. In addition, this technique can be extended to a great extent by the use of a number of sample introduction methods, i, e., ultrasonic nebulization, electrothermal vaporization, slurry sample introduction, laser ablation, spark & arc sampling and glow discharge. Less

本项目是在过去三年中进行的，目的是建立一种新的高功率微波诱导等离子体（MIP）-原子发射光谱（AES）系统。研究结果如下：1.在这项工作中，一个新的系统的高功率MIP-AES的设计和建造，因为这样的仪器是在市场上没有。它由一种新型的谐振腔和计算机控制的多元素光谱仪系统组成.与普通的低倍MIP相比，这种高倍N_2 MIP对样品溶液的连续雾化有很大的耐受性。此外，所构建的系统已被修改为联合收割机结合这种MIP与氢化物发生技术作为一个高效的样品引入。用这种新构造的MIP-AES系统与传统的溶液雾化相结合，测量了背景发射光谱。结果表明，在此条件下，OH、NH、N_2 ^+和NO的分子谱带特征明显 ...更多信息在200-400 nm的光谱范围内观察到。此外，在33个元素的84条发射线上考察了这种高倍N_2分子印迹聚合物的分析特性.砷、锑、硒与四氢硼钠反应生成的气态杂质可连续送入MIP中，灵敏测定。该方法已成功地应用于海藻（拟作为日本国立环境研究所标准样品的候选样品）、金属铜和钢中砷、锑和硒的测定，结果满意.展望本课题的前景，新研制的高功率N_2 MIP-AES系统应得到更多的验证，并应用于更广泛的实际样品。如果这个系统可以与其他分析技术相结合，化学形态分析可能是可能的，并且在环境化学中是有用的。此外，通过使用许多样品引入方法，该技术可以在很大程度上扩展，即，超声波雾化、蒸发、浆料进样、激光烧蚀、火花和电弧取样和辉光放电。少