Abstract
A variety of gases and vapours of organic compounds have been used as matrix modifiers in electrothermal atomic absorption spectroscopy (ETAAS). Oxidising gases such as air or nitrous-oxide, introduced during the charring stage, both thermally stabilised analytes such as lead, and improved the efficiency of pyrolysis by converting the normal charring into an ashing step. A number of interferences eg. magnesium chloride on lead determinations and non-specific absorbance interferences, decreased when air was introduced. Hydrocarbon gases (< 5% v/v) introduced during charring improved sensitivity (up to 89%) for certain refractory analytes (eg. Al, Ca, Mg, Si and V), prolonged tube life and improved precision.
Document Type
Thesis
Publication Date
1991-01-01
DOI
10.24382/3418
Recommended Citation
Fisher, A. (1991) REACTIVE GASES IN ELECTROTHERMAL ATOMISATION ATOMIC ABSORPTION SPECTROMETRY. Thesis. University of Plymouth. Available at: https://doi.org/10.24382/3418
