Quantitative Hydrogen Analysis of Zircaloy-4 Using Low-Pressure Laser Plasma Technique
| Autor: | Nasrullah Idris, Syahrun Nur Abdulmadjid, May On Tjia, Ken-ichi Fukumoto, Koo Hendrik Kurniawan, Muliadi Ramli, Tadashi Maruyama, Davy Putra Kurniawan, Kiichiro Kagawa, Zener Sukra Lie, Rinda Hedwig, Marincan Pardede, Hideaki Niki, Tjung Jie Lie |
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| Rok vydání: | 2007 |
| Předmět: |
Zirconium
Hydrogen Surface Properties Chemistry Lasers Zirconium alloy Analytical chemistry chemistry.chemical_element Plasma Surface Plasmon Resonance Laser Sensitivity and Specificity Analytical Chemistry law.invention Impurity law Calibration Pressure Physics::Atomic Physics Emission spectrum Helium |
| Zdroj: | Analytical Chemistry. 79:2703-2707 |
| ISSN: | 1520-6882 0003-2700 |
| DOI: | 10.1021/ac061713o |
| Popis: | It is found in this work that variation of laser power density in low-pressure plasma spectrochemical analysis of hydrogen affects sensitively the hydrogen emission intensity from the unwanted and yet ubiquitous presence of ambient water. A special experimental setup has been devised to allow the simple condition of focusing/defocusing the laser beam on the sample surface. When applied to zircaloy-4 samples prepared with various hydrogen impurity concentrations using low-pressure helium surrounding gas, good-quality hydrogen emission lines of very high signal to background ratios were obtained with high reproducibility under weakly focused or largely defocused laser irradiation. These measurements resulted in a linear calibration line with nonzero intercept representing the residual contribution from the recalcitrant water molecules. It was further shown that this can be evaluated and taken into account by means of the measured intensity ratio between the oxygen and zirconium emission lines. We have demonstrated the applicability of this experimental approach for quantitative determination of hydrogen impurity concentrations in the samples considered. |
| Databáze: | OpenAIRE |
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