Der Pharma Chemica
Journal for Medicinal Chemistry, Pharmaceutical Chemistry, Pharmaceutical Sciences and Computational Chemistry
ISSN: 0975-413X
Abstract
Determination of ultra-trace amount Chromium in water samples with 2-hydroxynaphthaldehydebenzoylhydrazone (HNPBH) by the potassium chlorate ion in sulfuric acid with kinetic spectrophotometric method
Author(s): Ali Kargar *, Sadegh Abdolah Zadeh, Ebrahim Niknam, Mona Ghorban Pour and Ehsan PakdamanA new kinetic spectrophotometic method for the determination of trace amount Chromium(III) in Tea real samples has been described based on it s the catalytic effect on the oxidations of 2-hydroxynaphthaldehydebenzoylhydrazone (HNPBH), by potassium chlorate in sulfuric acid. The reaction is followed spectrophotometrically 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 molL-1, 2-hydroxynaphthaldehydebenzoylhydrazone (HNPBH), 0.01 mol L-1 potassium chlorate at 35oC, calibration graph in the rang of 0.001-0.06 mg L-1 Chromium(III).Concentration was obtained with detection limit of 0.2303 g mL-1 by the fixed-time method of 5.5 min. The relative standard deviation for 0.05 mg L-1Chromium(III) is %90. No serious interference was identified. The applicability of the method was demonstrated by the determination of the Chromium(III) in Water samples.
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