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2003•Journal of Analytical ScienceRequires access

Determination of Trace Catechol by Inhibition Kinetic Spectrophotometry

Huang Xiang-yuan

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Abstract

In this paper, it has been found that manganese(Ⅱ) can catalyze the discoloration of Xylenol orange by potassium periodate in potassium phosphate monobasic-sodium phosphate dibasic buffer medium ,while the addition of catechol can inhibit the discoloration. The inhibition mechanics and kinetic parameter were studied, and a new method for the determination of trace catechol was established by inhibition kinetic spectrophotometry . The linear ranges are 0.5～5.0 (μg/25 mL) and 6.0～11.0 (μg/25 mL,) the detection limit of the method is 12.3 ng/mL. It is applied to the determination of catechol in waste water, and the result is satisfied.

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What this paper is about

In this paper, it has been found that manganese(Ⅱ) can catalyze the discoloration of Xylenol orange by potassium periodate in potassium phosphate monobasic-sodium phosphate dibasic buffer medium ,while the addition of catechol can inhibit the discoloration. The inhibition mechanics and kinetic parameter were studied, and a new method for the determination of trace catechol was established by inhibition kinetic spectrophotometry . The linear ranges are 0.5～5.0 (μg/25 mL) and 6.0～11.0 (μg/25 mL,) the detection limit of the method is 12.3 ng/mL. It is applied to the determination of catechol in waste water, and the result is satisfied.

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Available abstract

In this paper, it has been found that manganese(Ⅱ) can catalyze the discoloration of Xylenol orange by potassium periodate in potassium phosphate monobasic-sodium phosphate dibasic buffer medium ,while the addition of catechol can inhibit the discoloration. The inhibition mechanics and kinetic parameter were studied, and a new method for the determination of trace catechol was established by inhibition kinetic spectrophotometry . The linear ranges are 0.5～5.0 (μg/25 mL) and 6.0～11.0 (μg/25 mL,) the detection limit of the method is 12.3 ng/mL. It is applied to the determination of catechol in waste water, and the result is satisfied.

Key concepts: Chemistry, Potassium periodate, Catechol, Dibasic acid, Xylenol orange, Monobasic acid, Spectrophotometry, Detection limit

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