Determination of lead in tooth-pastes by electrothermal atomic-absorption spectrophotometry with platform atomization.
Electrothermal atomic-absorption spectrometry is used for the determination of lead in tooth-pastes, by means of the graphite platform/matrix-modification technique. The method is easy to apply, has limited interferences and is more precise than conventional flame AAS. The working concentration range is up to 100 mug/1. The method is characterized by a detection limit of 0.08 mug/1. and a precision of +/-1.9 % for the sample solutions. For the tooth-pastes, the detection limit is between 1.1 and 5.4 ng/g and the precision in the range 1.8-10%.
Khammas
Z A
ZA
Central Organization for Standardization and Quality Control, P.O. Box 13032, Jadiriyah, Baghdad, Iraq.
Farhan
M H
MH
Barbooti
M M
MM