Abstract
The silver ions and l-phenylalanine were co-deposited and formed a hybrid membrane on the surface of glassy carbon electrode by cyclic voltammetry. The membrane had good properties for catalyzing the redox of catecholamine neurotransmitters, including epinephrine (EP), norepinephrine (NE), and dopamine (DA). The electrochemical behaviors of these neurotransmitters were studied on this modified electrode. and therefore, an assay for each of them is set up and the detection limits for EP, NE, and DA are 7.2 × 10−9, 6.4 × 10−9, and 8.5 × 10−9 mol L−1, respectively. The proposed method can effectively eliminate the interference of the ascorbic acid and uric acid. The conditions which influenced the analyses were optimized. Using this method to determine the content of EP, NE, and DA in injections, the results were satisfactory.
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Acknowledgments
This work was supported by the Natural Science Foundation Committee of Shandong Province, China (no. ZR2009BM003), the National Natural Science Foundation of China (21105023), and China Postdoctoral Science Foundation Funded Project (no. 200902558; no. 20080430193).
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Qin, M., Cao, K., Wang, X. et al. Selective determination of catecholamine in the presence of ascorbic acid or uric acid on the membrane of silver nanoparticles/poly l-phenylalanine. Ionics 19, 1891–1896 (2013). https://doi.org/10.1007/s11581-013-0946-6
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DOI: https://doi.org/10.1007/s11581-013-0946-6