Determination of trace amounts of mercury (II) by catalytic kinetic method in environmental samples
by Neetu Bansal
World Review of Science, Technology and Sustainable Development (WRSTSD), Vol. 7, No. 4, 2010

Abstract: A highly selective and sensitive, spectrophotometric method is developed for the determination of Mercury(II) in environmental waters samples, based on indicator reaction of potassium hexacyanoferrate(II) and 2-methylpyrazine (2-Mepz), catalysed by Hg(II). The reaction was monitored spectrophotometrically at pH = 3.50 ± 0.02 and 25.0 ± 0.1°C by measuring the change in absorbance over time at 447 nm (λ_max = 447 nm) for 20 min. Mercury can be determined within the range 20.06-200.6 ng mL⁻¹ with relative standard deviation of sr = 3.02 at 20.06 ng/mL Hg(II) level. Interference due to many cations and anions was also studied at 200.6 ng/mL level.

Online publication date: Sun, 18-Apr-2010

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