Quantitative hydrogen analysis of zircaloy-4 using low-pressure laser plasma technique.
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.
Kurniawan
Koo Hendrik
KH
Research Center of Maju Makmur Mandiri Foundation, 40 Srengseng Raya, Kembangan, Jakarta Barat 11630, Indonesia. kurnia18@cbn.net.id
Pardede
Marincan
M
Hedwig
Rinda
R
Lie
Zener Sukra
ZS
Lie
Tjung Jie
TJ
Kurniawan
Davy Putra
DP
Ramli
Muliadi
M
Fukumoto
Ken-ichi
K
Niki
Hideaki
H
Abdulmadjid
Syahrun Nur
SN
Idris
Nasrullah
N
Maruyama
Tadashi
T
Kagawa
Kiichiro
K
Tjia
May On
MO
D002138:Calibration; D006859:Hydrogen / Q000032:analysis*; D007834:Lasers; D011312:Pressure; D012680:Sensitivity and Specificity; D020349:Surface Plasmon Resonance / Q000295:instrumentation / Q000379:methods*; D013499:Surface Properties; D015040:Zirconium / Q000737:chemistry*
D006859:Hydrogen; D015040:Zirconium