TY - JOUR
KW - Plasma diagnostics
KW - Laser ablation
KW - Icp-ms
KW - Direct solid sampling
KW - Dry plasma
KW - Icp-aes
KW - Matrix effects
AU - George C.Y Chan
AU - Wing-Tat Chan
AU - Xianglei Mao
AU - Richard E Russo
AB - <p>The sample matrix can influence the temperature, electron number density, and other excitation characteristics in the inductively coupled plasma (ICP). These ICP characteristics were investigated by measurements of the ionic to atomic spectral line intensity ratio of a test element (e.g. Mg and Zn). The effect of matrices of calcium (CaCO<sub>3</sub> and CaF<sub>2</sub>), strontium (SrCO<sub>3</sub>), lithium (Li<sub>2</sub>O, Li<sub>2</sub>CO<sub>3</sub> and LiF), magnesium (pure Mg and MgO), and aluminium metal on plasma conditions was studied using laser ablation sampling. Two Nd:YAG lasers were used to ablate the test element and the matrix simultaneously. Different amounts of matrix were ablated by varying one laser irradiance; the laser irradiance for the ablation of the test element was kept constant. Strontium, calcium, and magnesium had a more pronounced matrix effect than the easily ionizable elements (Li, Na and K). The matrix effect was independent of the anion. Experimental results suggest that the matrix effects may be due to a mechanism that involves the second ionization level of the elements (Sr, Ca and Mg).</p>
AD - <p>Univ Hong Kong, Dept Chem, Hong Kong, Hong Kong, Peoples R China Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA</p>
BT - Spectrochimica Acta Part B: Atomic Spectroscopy
C2 - LBNL-44859
DA - 03/2000
DO - 10.1016/S0584-8547(00)00140-3
IS - 3
LA - eng
LB - Laser
N2 - <p>The sample matrix can influence the temperature, electron number density, and other excitation characteristics in the inductively coupled plasma (ICP). These ICP characteristics were investigated by measurements of the ionic to atomic spectral line intensity ratio of a test element (e.g. Mg and Zn). The effect of matrices of calcium (CaCO<sub>3</sub> and CaF<sub>2</sub>), strontium (SrCO<sub>3</sub>), lithium (Li<sub>2</sub>O, Li<sub>2</sub>CO<sub>3</sub> and LiF), magnesium (pure Mg and MgO), and aluminium metal on plasma conditions was studied using laser ablation sampling. Two Nd:YAG lasers were used to ablate the test element and the matrix simultaneously. Different amounts of matrix were ablated by varying one laser irradiance; the laser irradiance for the ablation of the test element was kept constant. Strontium, calcium, and magnesium had a more pronounced matrix effect than the easily ionizable elements (Li, Na and K). The matrix effect was independent of the anion. Experimental results suggest that the matrix effects may be due to a mechanism that involves the second ionization level of the elements (Sr, Ca and Mg).</p>
PY - 2000
SP - 221
EP - 235
T2 - Spectrochimica Acta Part B: Atomic Spectroscopy
TI - Investigation of matrix effect on dry inductively coupled plasma conditions using laser ablation sampling
VL - 55
ER -