TY - JOUR KW - Comparison KW - Gas KW - USA KW - Emission KW - Water KW - Plasma diagnostics KW - Ablation KW - Laser KW - Laser ablation KW - Laser ablation KW - Intensities KW - Intensity KW - Time KW - Ca KW - E KW - Inductively coupled plasma (icp) KW - Inductively-coupled plasma KW - Matrix KW - Nebulization KW - Plasma KW - Sample KW - Spectrometry KW - Icp KW - Line KW - No KW - Process KW - Ratio KW - Science KW - Zn KW - C KW - England KW - Matrix effects KW - Argon plasma KW - Calcium KW - Carrier gas KW - Emission spectrometry KW - Emission spectrometry KW - Excitation KW - Ga KW - Line-intensities KW - Matrix effect KW - Ratios KW - Sample introduction KW - Solution KW - Solution nebulization KW - Analyte emission KW - Atomic emission spectrometry KW - Easily ionizable element KW - Electron number densities KW - Flow KW - Gas-flow rate KW - Inductively coupled plasma atomic emission spectrometry KW - Load KW - Plasmas KW - Rates KW - Water loading AU - George C.Y Chan AU - Wing-Tat Chan AU - Xianglei Mao AU - Richard E Russo AB -

Matrix effects of calcium in inductively coupled plasma-atomic emission spectrometry were investigated. Matrix effects were studied by monitoring the excitation conditions of the plasma using Zn ionic to atomic spectral line intensity ratios. Dry and wet inductively coupled plasmas with robust and non-robust conditions were compared. Laser ablation and solution nebulization sample introduction were used to produce the dry and wet plasma conditions, respectively. Low (0.61/min) and high (1.01/min) carrier gas flow rates were used to produce the robust and non-robust conditions, respectively. No differences in the trend of matrix effects for dry and wet plasmas were observed at vertical positions above normal observation height (> 8 mm height above load coil) for low and high carrier gas flow rates. However, matrix effects in the lower part of the plasma (< 8 mm height above load coil) were significantly different between dry and wet plasmas when a high carrier gas flow was used. The differences are likely due to the desolvation process. (C) 2001 Elsevier Science B.V. All rights reserved

AD -

Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China Lawrence Berkeley Lab, Berkeley, CA 94720 USA

AN - 136 BT - Spectrochimica Acta Part B-Atomic Spectroscopy C2 - LBNL-48244 LA - eng LB - Laser N1 -

LBNL-48244 NOT IN FILE

N2 -

Matrix effects of calcium in inductively coupled plasma-atomic emission spectrometry were investigated. Matrix effects were studied by monitoring the excitation conditions of the plasma using Zn ionic to atomic spectral line intensity ratios. Dry and wet inductively coupled plasmas with robust and non-robust conditions were compared. Laser ablation and solution nebulization sample introduction were used to produce the dry and wet plasma conditions, respectively. Low (0.61/min) and high (1.01/min) carrier gas flow rates were used to produce the robust and non-robust conditions, respectively. No differences in the trend of matrix effects for dry and wet plasmas were observed at vertical positions above normal observation height (> 8 mm height above load coil) for low and high carrier gas flow rates. However, matrix effects in the lower part of the plasma (< 8 mm height above load coil) were significantly different between dry and wet plasmas when a high carrier gas flow was used. The differences are likely due to the desolvation process. (C) 2001 Elsevier Science B.V. All rights reserved

PY - 2001 SP - 1375 EP - 1386 T2 - Spectrochimica Acta Part B-Atomic Spectroscopy TI - Comparison of matrix effects in inductively coupled plasma using laser ablation and solution nebulization for dry and wet plasma conditions VL - 56 ER -