Journal
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
Volume 15, Issue 4, Pages 409-413Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/a908658g
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The memory effects of mercury, gold and silver are eliminated by the use of sulfur containing complexing agents. In low concentrations (1 mu g ml(-1)) of mercury and gold, the addition of 2% L-cysteine gives wash-out times of less than 1 min for both elements. At higher concentrations of gold and mercury, and at low concentrations of silver, the reagent is less effective. Thiourea, at a concentration of 1%, eliminates the memory effects of silver, also giving wash-out times of approximately 1.5 min. The use of thiourea with higher concentrations (100 mu g ml(-1)) of mercury and gold delivers wash-out times of 1 min and 2 min, respectively. In a matrix similar to that found in many samples, the wash-out time for gold is less than 3.5 min and less than 2 min for mercury.
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