Lasareva O.P.

IONOMETRICAL DETERMINATION OF IRON (III) IN VEGETABLES AND FRUITS

The ability of iron (III) ionometric determination in a form of its thiosulfate complex was shown. Conditions of analysis were optimized. The obtained anionic electrode function E=f(pCFe(III) obeys to the Nernst equation in the range of 2.0 to 5.0 unit of MS and has a slope equals to 56±2 mV/pC. The determination selectivity in the presence of a number of cations and anions was studied by the “mixed” solutions method. The method was applied for the analysis of iron (III) content in some fruit and vegetables.

Key words: ion selective electrode, Fe(III) thiosulfate complex, electrode function slope, detec-tion limit, linearity range of calibration curve, determination selectivity

2016, Т. 59, № 3, Стр. 22-25
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