The Chemiluminescence of the Oxidization of p-Aminobenzene Sulfonic Acid and Its Application--Determination of Trace Amounts of Cobalt

Abstract

Abstract: The present paper contains the reaction of reagent p-aminobenzene sulfonic acid with hydrogen peroxide in the presence of cobalt (Ⅱ) as a catalyst in an alkaline solution to produce chemiluminescence. The chemiluminescence spectrum was recorded with a WP₄optical spectrophotometer, which shows that the maximum emission wavelength is 445 nm. Based on the catalysis of cobalt ions, the chemiluminescent method for the determination of trace.cobalt was established. The concentration range of linear response is 1.0×10^-11g/mLto 5.0×10^-7g/mL, the detection limit is 0. 01 ng/mL Co²⁺, and the method has a good selectivity. Having determined and studied the UV, IRand fluorescence spectra of the product of the chemiluminescence reaction and some reaction reagents, we discussed the mechanism of this chemiluminescence reaction. In addition, the effect of quenching on the chemiluminescence system was discussed briefly.

Key words: p-Aminobenzene sulfonic acid, Chemiluminescence, Cobalt

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Lu Xiao-hu, Lu Ming-gang . The Chemiluminescence of the Oxidization of p-Aminobenzene Sulfonic Acid and Its Application--Determination of Trace Amounts of Cobalt[J]. Chem. J. Chinese Universities, 1991, 12(7): 886.

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The Chemiluminescence of the Oxidization of p-Aminobenzene Sulfonic Acid and Its Application--Determination of Trace Amounts of Cobalt

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