Determination of ultra-trace amount mercury (II) ion in Tap water and River
water samples with the barium di phenyl amine sulfonate by the chlorate ion
in sulfuric acid with kinetic method

Ali Savarian; Saideh Bagheri; Ali Kargar

Abstract

Determination of ultra-trace amount mercury (II) ion in Tap water and River water samples with the barium di phenyl amine sulfonate by the chlorate ion in sulfuric acid with kinetic method

Author(s): Ali Savarian, Saideh Bagheri and Ali Kargar

new kinetic spectrophotometic method for the determination of trace amount mercury(II) in Tap water and River water samples has been described based on it s the catalytic effect on the oxidations of barium die phenyl aminosulfunate, by potassium chlorate in sulfuric acid. The reaction is followed spec- trophotometrically by measuring the decrease in the absorbance at 469 nm. Under the optimum conditions of 0.2 molL-1 sulfuric acid, 1.0 × 10-4 mol L-1, barium die phenyl aminosulfunate, 0.01 mol L-1 potassium chlorate at 35oC, calibration graph in the rang of 0.001-0.06 ng L-1 mercury(II). Concentration was obtained with detection limit of 0.2303 g mL-1 by the fixed-time method of 4.5 min. The relative standard deviation for 0.05 ng L-1 mercury(II) is %90. No serious interference was identified. The applicability of the method was demonstrated by the determination of the mercury (II) in Tap water and River water samples.

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