Sorption-Spectrophotometric and Visual Test Determination of Trace Silicon as an Ion Associate of 12-Molybdosilicate with Crystal Violet

作者：Selivanova T V^*; Vishnikin A B; Tsyganok L P

来源：Journal of Analytical Chemistry, 2010, 65(2): 142-147.

DOI：10.1134/S1061934810020073

The adsorption of the ion associate (IA) of the heteropoly anion (HPA) of beta-SiMo(12)O(40)(4-) with Crystal Violet (CV) on polyurethane foams (PUF) was studied; the conditions of HPA formation and adsorption as an IA with CV were optimised. The calculated adsorption capacity of PUF toward IA and the constant of adsorption, 0.77 mu mol/g and 1.3 x 10(6) L/mol, respectively, were determined from the linearized Langmuir's adsorption isotherm. A procedure was developed for the sorption-spectrophotometric and visual test determination of silicon; c(min) = 2 x 10(-8) M. The procedures were validated on examples of drinking, distilled, and mineral waters.

• 出版日期2010-2