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Carbon nitride quantum dots enhanced-chemiluminescence of hydrogen peroxide and hydrosulfite and its application in ascorbic acid sensing

Abstract

Weak chemiluminescent (CL) reaction of hydrogen peroxide and hydrosulfite was greatly enhanced by carbon nitride quantum dots (g-CNQDs). CL experiments and electron spin resonance (ESR) investigation indicated that g-CNQD increased the production of singlet oxygen (1O2), superoxide radical (•O2−) and sulphite radical anion( •SO3−) in the hydrogen peroxide-hydrosulfite CL system, which could attribute to the enhanced-CL intensity and gave us new insights into the character of fluorescent carbon nitride quantum dots. Ascorbic acid exerted inhibition effect on the hydrogen peroxide–hydrosulfite–g-CNQD CL system. This phenomenon was utilized as a determination method of ascorbic acid in the concentration ranging from 2.85×10-7 to 2.85×10-4 mol/L, with a detection limit of 8.0×10-8 mol/L. Ascorbic acid in tablets and injections has been successfully detected with recoveries in the range of 96.2 % to 106%.

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Publication details

The article was received on 01 Dec 2017, accepted on 02 Jan 2018 and first published on 03 Jan 2018


Article type: Paper
DOI: 10.1039/C7AY02777J
Citation: Anal. Methods, 2018, Accepted Manuscript
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    Carbon nitride quantum dots enhanced-chemiluminescence of hydrogen peroxide and hydrosulfite and its application in ascorbic acid sensing

    B. Chen, F. Wang, W. Yao, Z. Lin, X. Zhang, S. Luo, L. Zheng and X. Lin, Anal. Methods, 2018, Accepted Manuscript , DOI: 10.1039/C7AY02777J

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