Study of Hydrogen and Deuterium Emission Characteristics in Laser-Induced Low-Pressure Helium Plasma for the Suppression of Surface Water Contamination
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- 作者：Munadi ; Marincan Pardede ; Rinda Hedwig ; Maria Margaretha Suliyanti ; Tjung Jie Lie ; Zener Sukra Lie ; Koo Hendrik Kurniawan ; Kiichiro Kagawa ; Muliadi Ramli ; Kenichi Fukumoto ; Tadashi Maruyama ; May On Tji
- 刊名：Analytical Chemistry
- 出版年：2008
- 出版时间：February 15, 2008
- 年：2008
- 卷：80
- 期：4
- 页码：1240 - 1246
- 全文大小：143K
- 年卷期：v.80,no.4(February 15, 2008)
- ISSN：1520-6882
文摘
An experimental study was conducted in search of theexperimental condition required for the much neededsuppression of spectral interference caused by surfacewater in hydrogen analysis using laser-induced low-pressure helium plasma spectroscopy. The problem arising from the difficulty in distinguishing hydrogen emissionfrom hydrogen impurity inside the sample and thatcoming from the water molecules was overcome by takingadvantage of similar emission characteristics shared byhydrogen and deuterium demonstrated in this experimentby the distinct time-dependent and pressure-dependentvariations of the D and H emission intensities from theD-doped zircaloy-4 samples. This similarity allows thestudy of H impurity emission in terms of D emission fromthe D-doped samples and thereby separating it from theH emission originating from the water molecules. Employing this strategy has allowed us to achieve the largesuppression of water induced spectral interference fromthe previous minimum of 400 
g/g to the current valueof 30 g/g when a laser beam of 34 mJ under tightfocusing condition was employed. Along with this favorable result, this experimental condition has also provideda much better (about 6-fold higher) spatial resolution,although these results were achieved at the expense ofreducing the linear calibration range from the previous4 300 g/g to the present 200 g/g.
g/g to the current valueof 30 g/g when a laser beam of 34 mJ under tightfocusing condition was employed. Along with this favorable result, this experimental condition has also provideda much better (about 6-fold higher) spatial resolution,although these results were achieved at the expense ofreducing the linear calibration range from the previous4 300 g/g to the present 200 g/g.