[Determination of trace Pb, Cu and Cd in environmental sample by slotted-tube atom-trapping atomic absorption spectrometry].
The optimal measuring conditions of slotted-tube atom-trapping atomic absorption spectrometry of Pb, Cu and Cd were examined in detail. The results show that the characteristic concentrations measured after trapping for 1min under definite conditions were 1.82 x 10(-3), 1.26 x 10(-3) and 6.7 x 10(-5) mg/L for Pb, Cu and Cd, respectively. Thus slotted tube atom-trapping AAS yields increase in sensitivety for Pb, Cu and Cd by 110, 39 and 150 fold, respectively, in comparison with the conventional FAAS. Trace elements Pb, Cu and Cd in earth surface water, tea and hair were determined by slotted tube atom-trapping. Satisfactory results were obtained.
Qian
S
S
Department of Environment Science, Wuhan University, 430072 Wuhan.
Huang
G
G
Yang
H
H
Kang
H
H
Wen
Q
Q