Issue 7, 1988

Lead atomisation from soil by slurry introduction electrothermal atomisation atomic absorption spectrometry. Part 2. Atomisation characteristics with various matrix modifiers

Abstract

Lead atomic absorption signals were obtained from a model soil matrix (montmorillonite and humic acid) introduced into a graphite furnace as slurry particles. The effects of various matrix modifiers on the absorbance-peak characteristics were studied. This provided information on probable atomisation processes and mechanisms of matrix modification. Several soils were analysed and the modifiers Mg, phosphate, a Mg-phosphate mixture, Pd and a Mg-Pd mixture were all effective. The Mg-Pd mixture was the most suitable, because it produced similar absorbance appearance and peak maximum times for the slurries and aqueous calibration standards. Other matrix modification methods (making the slurry in 1% HNO3, O2 ashing and pre-slurry ashing in a muffle furnace) were less suitable, because the Pb atomisation characteristics differed from those of aqueous standards.

Article information

Article type
Paper

J. Anal. At. Spectrom., 1988,3, 997-1003

Lead atomisation from soil by slurry introduction electrothermal atomisation atomic absorption spectrometry. Part 2. Atomisation characteristics with various matrix modifiers

M. W. Hinds and K. W. Jackson, J. Anal. At. Spectrom., 1988, 3, 997 DOI: 10.1039/JA9880300997

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