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首页> 外文期刊>Der Pharma Chemica: journal for medicinal chemistry, pharmaceutical chemistry and computational chemistry >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
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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

机译：动力学光度法测定硫酸中的氯酸钾离子与2-羟基萘甲醛甲酰zone（HNPBH）测定水样中的痕量铬。

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摘要

A 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.
机译：建立了一种动力学分光光度法测定茶叶中的痕量铬（Ⅲ）的新方法，该方法基于氯酸钾在硫酸中对2-羟基萘醛苯甲酰hydr（HNPBH）氧化的催化作用。通过分光光度法通过测量469nm处吸光度的降低来跟踪反应。在35oC的最佳条件下，分别为0.2 molL-1硫酸，1.0×10-4 molL-1、2-羟基萘醛苯甲酰hydr（HNPBH），0.01 mol L-1氯酸钾，校正图的范围为0.001-0.06 mg L- 1铬（III）。通过5.5分钟的固定时间方法获得的检出限为0.2303 g mL-1的浓度。 0.05 mg L-1铬（III）的相对标准偏差为％90。没有发现严重干扰。该方法的适用性通过测定水中样品中的铬（III）来证明。

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