Removal of organic solvents by cryogenic desolvation in inductively coupled plasma mass spectrometry. Invited lecture
- 1 January 1994
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Analytical Atomic Spectrometry
- Vol. 9 (3) , 399-403
- https://doi.org/10.1039/ja9940900399
Abstract
Methanol, ethanol, acetone or acetonitrile were nebulized continuously with an ultrasonic nebulizer. The solvent was removed from the aerosol stream by repetitive heating at approximately 100 °C and cooling in a set of cryogenic loops at –80 °C. The resulting aerosol was then introduced into an inductively coupled plasma mass spectrometer. Ethanol was the only solvent that required a continuous dose of additional O2(1–5%) in the aerosol gas to prevent deposition of carbon on the sampler. Oxide ratios for LaO+:La+ and UO+:U+ were 0.03–0.1%. Cryogenic desolvation attenuated but did not eliminate the usual carbon-containing polyatomic ions (e.g., CO+, CO2 +, ArC+ and ArCO+). Analyte sensitivities from metal nitrate salts in methanol were comparable to the sensitivities from aqueous metal solutions. Substantial memory effects were observed from several metal complexes.Keywords
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