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Investigation of ICP Emission Spectrometry with Wavelength Modulation-Differential Photometry

波长调制-差示光度法 ICP 发射光谱法的研究

基本信息

批准号：
60550536
负责人：
KAWAGUCHI HIROSHI
金额：
$ 1.34万
依托单位：
Faculty of Engineering, Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550536/
关键词：
Emission spectrometry Inductively coupled plasma Wavelength modulation 微分測光法

项目摘要

1. An image-dissecto tube was evaluated as a two-dimentional detector of a spectrometer, especially in the inductively coupled plasma (ICP) emission spectrometry.2. At the first stage of the investigation, the tube was attached to a small monochromator to observe sensitivity, resolution, and capability of differential photometry. The results showed that the tube was less sensitive than a conventional photomultiplier by more than an order of magnitude. It was possible, however, to excecute the differential photometry with the tube by modulating the wavelength electronically rather than mechanically. Simultaneous multielement analysis can also be carried out without complex mechanics in the spectrometer.3. Next, the image dissector tube was installed at the focal plane of a l-m grating spectrograph replacing the photogrphic plate holder. The ICP emission spectrometry was carried out using either of three measuring systems, direct current amplification, differential photometry with a lock-in-amplifier, and digital integration with a transient memory and a signal averager. The latter two methods were superior to the direct current amplification method in sensitivity and signal-to-noise ratio. The capability of background correction and multielement analysis was demonstrated by the use of the image dissector tube in ICP emission spectrometry.

1.对图像解剖管作为光谱仪的二维探测器进行了评价，特别是在电感耦合等离子体（ICP）发射光谱中.在研究的第一阶段，将该管连接到小型单色仪上，以观察灵敏度、分辨率和差示光度测定的能力。结果表明，该管的灵敏度比传统的光电倍增管低一个数量级以上。然而，通过电子而不是机械地调制波长，可以用管执行差示光度测量。同时也可以进行多元素分析，而无需在光谱仪中进行复杂的机械操作。然后，将析象管安装在1米光栅摄谱仪的焦平面上，代替照相板保持器。使用三种测量系统中的任一种进行ICP发射光谱法，所述测量系统为直流放大、具有锁定放大器的差分光度法以及具有瞬态存储器和信号平均器的数字积分。后两种方法在灵敏度和信噪比方面均上级直流放大法。将析象管应用于ICP发射光谱分析中，证明了析象管的背景校正和多元素分析能力。