[Determination of trace silver in surface water samples by flame atomic absorption with continuous flow on-line absorption preconcentration].
In a continuous flow on-line preconcentration system, trace silver was adsorbed onto activated carbon particles packed in micro colum at pH 1, eluted with 0.3 ml of 10 g/L Na2S2O3 solution and determined by flame atomic absorption spectrometry. For surface water samples, 25 ml sufficed precise determination of silver at level of microgram/L. The relative standard deviation of 10 parallel sample determinations was 6.9%. The proposed method was successfully applied to water samples with recoveries ranging from 93.2% to 104.6% and a throughout of 7-8 sampling/h.
Zhang
K
K
Li
C
C
Zhang
Y
Y
He
J
J
Fan
H
H
D012834:Silver / Q000032:analysis*; D013054:Spectrophotometry, Atomic / Q000379:methods; D014881:Water Supply
D012834:Silver