抄録
A method for a direct determination of trace quantities of selenium by anodic stripping voltammetry has been developed. A mercury-coated graphite wax electrode was used for this determination. It is possible to determine 2×10-9M Se with a relative standard deviation (n=6) of 3.7% in solutions containing copper (up to 10% of the concentration of selenium). The presence of other elements, including tellurium, does not interfere. The presence of copper appears to be critical in the application of this method; in this case, if the quantity of selenium falls into the range 1.8_??_r_??_11, where r is the Cu/Se concentration ratio, selenium can be determined from the Cu-Se peak, which belongs to an intermetallic compound between copper and selenium. Considering that the known methods generally require an elimination of copper from the solution, the present method enables one to make such a determination in the presence of copper, even though it is within a short interval (1.8_??_r_??_11).
