Determination of lead in preserved egg by flame atomic absorption spectrometry after chemically modified preconcentration.
A sensitive method for the determination of lead in preserved egg by flame absorption spectrometry using ammonium pyrrolidine dithiocarbamate-polystyrene chemically modified platinum wire matrix is presented. The modified platinum wire matrix, after preconcentrating the lead, is placed in a flame burner for direct atomization and measurement. The concentration range is linear between 5 and 500 ng/ml lead in solution and the detection limit is 0.65 ng/ml. This new technique is sensitive and convenient.
Lu
G
G
Department of Chemistry, Central China Normal University, Wuhan, People's Republic of China.
Wang
X
X
Wan
J
J
Fon
S
S
Xu
H Y
HY