University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Website: @unf

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Inorganic compound

Citations 1

"Determination Of Impurities In Organometallic Compounds Dissolved In Ethyl Ether By Flow Injection Inductively Coupled Plasma Mass Spectrometry"
J. Anal. At. Spectrom. 1992 Volume 7, Issue 6 Pages 895-989
Steve J. Hill, James Hartley and Les Ebdon

Abstract: The sample (10 to 25 µL) was injected into a carrier stream of 2% HNO3. By incorporating a membrane drying tube for desolvation, the detection limits for Al, Cu, In, Pb and Zn were between 0.5 and 1.0 ng l-1. The recoveries were from 92.6 ± 8.6% to 107.6 ± 10.3% for 8.2 ± 0.8 to 96.1 ± 10.7 ng l-1. The method was applied to trimethylgallium and methyl-lithium. A novel method of introducing organometallic samples dissolved in volatile organic solvents into an inductively coupled plasma mass spectrometer is described and characterized. Small volumes of organic solvent are injected into a carrier stream of dilute nitric acid (2%) using a flow injection valve. The uptake rates employed are typical of those used for aqueous samples (1-4 mL min-1) and the volume of sample used is such that the plasma remains stable throughout the study. The optimum operating conditions for this process, determined using the variable step size simplex procedure, are discussed in detail. The detection limits obtained are in the ng mL-1 range; they were compared with those obtained using a modified sample introduction system incorporating a membrane dryer tube for desolvation. This modification improves the sensitivity to facilitate detection limits at the sub ng mL-1 level. Finally the determination of metallic impurities present at levels of the order of 1 ng mL-1 in two organometallics, trimethylgallium and methyllithium, both stabilized in di-Et ether, is reported.
Aluminum Copper Indium Lead Zinc Mass spectrometry Organic solvent Interface Membrane Simplex