[Study of the reproducibility and sensitivity of laser microspectral analysis in argon atmosphere at reduced pressure].
In argon atmosphere at reduced pressure, the spectral analysis reproducibility and sensitivity are experimentally studied with the laser microprobe emission spectral analysis(LMESA) system for the metal alloy standard samples. For the atomic spectral analysis line, the relative standard deviation(RSD) in argon atmosphere at reduced pressure is better than that in air atmosphere. For the ionic spectral analysis line, the RSD is almost the same in both cases. The RSD is strongly affected by the composition of the sample and the concentration of elements. The measured slope of calibration curves for the determination of Cu, Zn and Mg in an aluminum alloy in argon atmosphere is about 1.5-2 times of that in the air atmosphere, which indicates an obvious improvement of the sensitivity and is helpful to expand the dynamic range of the spectral analysis.
Guo
Q L
QL
Department of Physics, Hebei University, Baoding 071002, China.
Liang
B L
BL
Wei
Y H
YH
Chen
J Z
JZ
D000497:Alloys / Q000737:chemistry; D000535:Aluminum / Q000737:chemistry; D001128:Argon / Q000737:chemistry; D001272:Atmosphere; D001274:Atmospheric Pressure; D003300:Copper / Q000737:chemistry; D007834:Lasers; D011312:Pressure; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013053:Spectrophotometry / Q000295:instrumentation / Q000379:methods*
D000497:Alloys; D001128:Argon; D003300:Copper; D000535:Aluminum