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The determination of lead at the nanomolar level by square-wave anodic-stripping voltammetry (SWASV) without removal of oxygen has been extended to the sub-nanomolar concentration range. The detection limit has been lowered with the use of a method of differences (SWASV_D) to 0.05nM (10ngl -1 ) at 60s electrodeposition. In this method the analytical signal is the difference between the...
Lead and cadmium have been determined by subtractive anodic-stripping voltammetry (SASV) in the square-wave mode at a silver electrode without removal of oxygen. The sensitivities and detection limits for the two metals differ considerably. Detection limits of 0.05nM for lead and 1nM for cadmium have been achieved following 90s electrodeposition. The repeatability of consecutive SASV runs is good...
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