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A method has been developed for the direct determination of trace silver using derivative atom trapping flame atomic absorption spectrometry with modified water-cooled stainless steel trapping equipment. The conditions that influence the sensitivity of the method were studied. For a 1 min collection, the characteristic concentration (giving a derivative absorbance of 0.0044) and detection limit...
A procedure for the sequential determination of arsenite [As(III)] and arsenate [As(V)] based on electrochemical detection for As(III) and spectrophotometric detection for As(V) following ion chromatographic separation was developed. The color-developing system was based on the ion-association complex formed by heteropolymolybdoarsenic acid with bismuth in the presence of Triton X-100. Experimental...
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