TY - JOUR
T1 - Investigation of matrix effects in inductively coupled plasma-atomic emission spectroscopy using laser ablation and solution nebulization - effect of second ionization potential
JF - Spectrochimica Acta Part B-Atomic Spectroscopy
Y1 - 2001
A1 - Chee Yuen (George) Chan
A1 - Wing-Tat Chan
A1 - Xianglei Mao
A1 - Richard E. Russo
KW - ablation
KW - argon
KW - argon plasma
KW - c
KW - ca
KW - calcium
KW - carrier gas
KW - charge-exchange
KW - diagnostics
KW - e
KW - easily ionizable elements
KW - element
KW - elements
KW - emission
KW - emission spectrometry
KW - emission spectroscopy
KW - emission-spectrometry
KW - emission-spectroscopy
KW - england
KW - excitation
KW - ga
KW - gas
KW - helium
KW - icp
KW - inductively coupled plasma
KW - inductively coupled plasma atomic emission spectroscopy
KW - inductively-coupled-plasma
KW - intensities
KW - intensity
KW - interference
KW - interference mechanism
KW - interferences
KW - ion
KW - ionization
KW - ions
KW - laser
KW - laser ablation
KW - laser-ablation
KW - lecture
KW - line
KW - line-intensities
KW - magnesium
KW - matrices
KW - matrix
KW - matrix effect
KW - matrix effects
KW - mechanism
KW - mixed-gas plasma
KW - mixture
KW - nebulization
KW - plasma
KW - plasma diagnostics
KW - power
KW - ratio
KW - ratios
KW - sample
KW - sample introduction
KW - science
KW - solution
KW - solution nebulization
KW - spectrometry
KW - spectroscopy
KW - time
KW - usa
KW - zinc
AB - Plasma-related non-spectroscopic matrix effects of 31 elements in inductively coupled plasma (ICP)-atomic emission spectrometry were investigated using both laser ablation and solution nebulization as sample introduction techniques. Matrix effects were studied by monitoring the excitation conditions of the plasma using the ionic to atomic spectral line intensity ratios of zinc and magnesium. A new kind of matrix interference was found in the ICP that appears to be related to matrices with elements of low second ionization potential. The matrix effects do not correlate with the first ionization potential of the element. Only those matrix elements with low second ionization potential showed severe matrix effects. Increasing the forward power of the ICP or replacing the carrier gas with a 50%/50% argon-helium mixture did not significantly reduce this matrix effect. However, using 100% helium as the carrier gas greatly reduced the extent of this matrix effect, suggesting that argon is involved in the interference mechanism. The interference mechanism may involve interactions between doubly-charged matrix ions and argon species. (C) 2001 Elsevier Science B.V. All rights reserved

VL - 56
N1 - LBNL-47088 NOT IN FILE

U2 - LBNL-47088
ER -