Carbon nitride quantum dot-enhanced chemiluminescence of hydrogen peroxide and hydrosulfite and its application in ascorbic acid sensing†,Analytical Methods

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Carbon nitride quantum dot-enhanced chemiluminescence of hydrogen peroxide and hydrosulfite and its application in ascorbic acid sensing†
Analytical Methods ( IF 2.7 ) Pub Date : 2018-01-03 00:00:00 , DOI: 10.1039/c7ay02777j
Bing Chen _{1,

2,

3,

4,

5} , Feifei Wang _{1,

2,

3,

4,

5} , Wensong Yao _{1,

2,

3,

4,

5} , Zhen Lin _{1,

2,

3,

4,

5} , Xiaomin Zhang _{1,

2,

3,

4,

5} , Shu Luo _{1,

2,

3,

4,

5} , Linlin Zheng _{1,

2,

3,

4,

5} , Xinhua Lin _{1,

2,

3,

4,

5}

Affiliation

Herein, weak chemiluminescence (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; this could be attributed to the enhanced-CL intensity and gave us new insights into the character of fluorescent carbon nitride quantum dots. Ascorbic acid exerted an inhibition effect on the CL of 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⁻¹, with a detection limit of 8.0 × 10⁻⁸ mol L⁻¹. Ascorbic acid in tablets and injections has been successfully detected with recoveries in the range from 96.2% to 106%.

中文翻译：

氮化碳量子点增强的过氧化氢和亚硫酸氢盐化学发光及其在抗坏血酸传感中的应用†

在此，过氧化氢和亚硫酸氢盐的弱化学发光（CL）反应通过氮化碳量子点（g-CNQDs）大大增强了。CL实验和电子自旋共振（ESR）的调查表明，G-CNQD增加了生产的单线态氧（的¹ Ò ₂），超氧自由基（O ₂^-），和亚硫酸盐自由基阴离子（SO ₃^-）在过氧化氢－亚硫酸氢盐CL体系中；这可以归因于增强的CL强度，这使我们对荧光氮化碳量子点的特性有了新的认识。抗坏血酸对过氧化氢-亚硫酸氢盐-g-CNQD CL系统的CL产生抑制作用。该现象被用作抗坏血酸的测定方法，其浓度范围为2.85×10 ^-7至2.85×10 ^-4 mol L ^-1，检出限为8.0×10 ^-8 mol L ^-1。已成功检测到片剂和注射剂中的抗坏血酸，回收率在96.2％至106％之间。

更新日期：2018-01-03

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