In situ gaseous pre-treatment of liver extracts in a modified carbon rod atomiser during the determination of cadmium and lead

Abstract

An in situ gaseous pre-treatment of bovine liver extracts was performed in a modified carbon rod atomiser. Nitrogen, hydrogen, oxygen and methane were introduced into the atomiser to eliminate interference and to effect the continuous re-coating of the atomiser with pyrolytic graphite. An optical device improved the precision of the injection of the sample. The effectiveness of the in situ sample pre-treatment was demonstrated by the determination of cadmium and lead in certified samples.