Journal
RSC ADVANCES
Volume 8, Issue 42, Pages 23720-23726Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ra03528h
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Funding
- National Natural Science Foundation of China [21205108, 21705036]
- Foundation for University Key Teacher by Henan Province [2017GGJS007]
- Fundamental Research Funds for the Central Universities from Hunan University
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Ascorbic acid (AA) as an essential vitamin in the human body participates in various physiological reactions and plays a key role in many biochemical processes. Therefore, it is of vital importance to monitor and quantify AA in commercial tablets, beverages and food. In this work, a rapid and ultrasensitive chemiluminescence (CL) system for the detection of AA was developed, in which ultrathin cobalt oxyhydroxide (CoOOH) nanosheets were applied in the conventional luminol-H2O2 CL system. The results showed that ultrathin CoOOH nanosheets as a catalyzer remarkably improved the CL intensity of the CoOOH-luminol-H2O2 system, up to about 1400-fold. Under the optimized conditions, the CL inhibition efficiencies increase linearly with the concentrations of AA in the range of 1-500 pmol L-1, and the limit of detection was 39 fmol L-1. Moreover, the proposed CL system was successfully applied in the determination of AA in medicinal tablets with satisfactory results.
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