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
Recommended Citation
Fisher, A. (1991) REACTIVE GASES IN ELECTROTHERMAL ATOMISATION ATOMIC ABSORPTION SPECTROMETRY. Thesis. University of Plymouth. Retrieved from https://pearl.plymouth.ac.uk/gees-theses/116
