consistently
nonmonotonic interference pattern.
The specialized literature includes various
procedures for the elimination of interferences
due to the presence of metals. Thus,
Danielson et al.82 overcame the strong interference
of copper in the determination of
zinc by adding gallium, which forms a more
stable intermetallic compound with copper,
thus allowing zinc to be oxidized at its normal
stripping potential. Copper(II) can thus
be determined in the presence of zinc following
deposition at a potential where Zn(II)
is not reduced