[Determination of net analyte emission intensity and signal-background ratio of Mg, Cr, Cd and Mn in Ar-air mixed coolant gas ICP].
The dependence of net analyte emission intensity and signal-background ratio on coolant gas composition and observation heights for 8 lines of four elements (Mg, Cr, Cd and Mn) in Ar-air mixed coolant gas ICP was measured under the similar condition as that in the low power Ar-ICP with a commercial sequential plasma spectrometer. Further, the detection limits under compromise conditions were estimated. The results show that ion lines and neutral atom lines with high excitation energy have maximum intensity and are more intense than those in the Ar-ICP, when 5-10% air is added to the coolant flow. The intensity of neutral atom lines with low excitation energy drops gradually as air is added to coolant flow. The signal-background ratio of analyte lines depends upon excitation energy and wavelength.
Li
Y
Y
Department of Chemistry, Trace Element Institute of Tongji University, 200092 Shanghai.
Zeng
X
X
Wang
M
M
Wu
B
B
Ni
Y
Y