Reported is a cell designed specifically for high speed anodic stripping analysis. Metals amenable to this technique are determined at the 1-ppb level or less within 10 min total analysis time and with a precision of 5%. The cell, which is closed at the bottom and partially open at the top, is rotated at a high rate, thus forcing the sample solution into a thin film which is then sparged of oxygen within 75 sec prior to the analysis. A stirrer of new design and rotated at 180,0 rpm is employed to assure the rapid accumulation of the amalgam. Recommendations for the kinds of waxes suitable for the impregnation of the graphite electrodes employed is given. A step and hold voltage ramp is used in stripping the amalgam and the resulting digitally recorded data are transferred onto magnetic tape for processing with a user interactive program written for the CDC-6600 computer. Two methods for purifying reagent grade KCl are offered. One involves recrystallization; the other, amalgam exchange of electroreducible impurities for aluminum ions.
A cell which is rotated at high speeds and contains a thin-layer, mercury, working electrode has been developed for controlled potential coulometric determinations. The cell, which is the first successful departure from stirred mercury pool types, has several advantageous features. Constant mercury geometry Briefly mentioned in a previous paper (J), but detailed
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