Abstract
In the present study, we synthesized a water-soluble substance (Hemin-mPEG) at room temperature by using hemin and poly(ethylene glycol) methyl ether (mPEG). It was found that the Hemin-mPEG maintained the excellent catalytic activity inherited from hemin, and was first used to catalyze a luminol–H2O2 chemiluminescence (CL) system to generate an intense and slow CL signal. The results of a mechanism research showed that the presence of Hemin-mPEG could promote the production of oxygen-relative radicals from H2O2 and dissolved oxygen in solution. Based on this mechanism, an ultra-sensitive, cheap and simply practical sensor for detecting glucose and H2O2 was developed. Under the most optimal experimental conditions, H2O2 and glucose detection results exhibited a good linear range from 0.002 to 3 μM and from 0.02 to 4 μM, respectively, and the detection limits were 1.8 and 10 nM, respectively. This approach has been successfully used to detect glucose in actual biological samples, and achieved good results.
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Acknowledgments
This work was supported by the State Major Project for Science and Technology Development, China (No. 2011YQ14015001), the Science-Technology Development Project of Jilin Province of China (No. 20150204060GX).
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Wang, Z., Dong, B., Feng, G. et al. Water-soluble Hemin-mPEG-enhanced Luminol Chemiluminescence for Sensitive Detection of Hydrogen Peroxide and Glucose. ANAL. SCI. 35, 1135–1140 (2019). https://doi.org/10.2116/analsci.19P150
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DOI: https://doi.org/10.2116/analsci.19P150