STUDIES ON THE SYNERGISTIC EFFECTS OF METAL-CATIONS ON KINETIC REACTIONS AND THEIR ANALYTICAL APPLICATIONS

The synergistic or mutual catalytic effect between metal cations such as molybdenum(VI) and tungsten(VI), silver(I) and mercury(II), and iru n(II) and antimony(III) on different kinetic reaction systems, had bee n studied spectraphotometrically with a stopped flow-FIA technique. Th e degree of synergistic effect was expressed by the proposed synergist ic catalytic coefficient D. The deviations of absorbance from additivi ty of outside certain concentration ranges could be compensated, for b y introducing the synergistic coefficient into tile procedures for sim ultaneous determination of a binary mixture with the stopped flow-FIA method proposed previously, and the linear concentration ranges could be enlarged by compensating. Molybdenum and tungsten in steel, iron an d antimony in a zinc standard, and silver and mercury in wastewater ha d been determined, and the results are satisfactory. (C) 1996 Academic Press, Inc.