Spectrophotometric determination of nickel(ii) with molybdophosphoric acid.
A sensitive spectrophotometric method for the determination of nickel, based on the reduction of a complex formed between molybdophosphoric acid and Ni(II) at pH 4.3 has been developed. Excess of molybdophosphoric acid is eliminated by complexation with sodium citrate. The method is rapid and the system obeys Beer's law up to 5 ppm of Ni(II). The molar absorptivity is 1.30 x 10(3) 1.mole(-1).mm(-1). The technique compares favourably with existing photometric methods for nickel in sensitivity and is reasonably selective.
Heller
R L
RL
Department of Chemistry, University of Missouri, Columbia,Missouri 65201, U.S.A.
Guyon
J C
JC