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result sql = Microporous carbon in the selective electro-oxidation of molecular biomarkers: uric acid, ascorbic acid, and dopamine.
Microporous carbon in the selective electro-oxidation of molecular biomarkers: uric acid, ascorbic acid, and dopamine.
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result sql = Herein, we demonstrate the superior electrocatalytic activities of microporous carbon in the oxidation of three molecular biomarkers, ascorbic acid (AA), dopamine (DA), and uric acid (UA), which are co-present in biological fluids. The voltammetric responses of AA, DA, and UA at the low-cost microporous carbon electrode show significantly better sensitivity and selectivity than other more expensive and commonly used electrode materials such as copper(ii) oxide, copper(i) oxide, and carbon nanotube. Differential pulse voltammetry at the microporous carbon electrode allows the detection of AA, DA, and UA with linear ranges of 100-2000 μM (AA), 10-150 μM (DA), and 10-150 μM (UA), sensitivities of 6.8 ± 0.2 nA μM-1 (AA), 261.4 ± 3.4 nA μM-1 (DA), and 93.5 ± 2.0 nA μM-1 (UA), and detection limits of 23.1 μM (AA), 0.2 μM (DA), and 1.7 μM (UA). The method has been validated with a synthetic urine sample to yield ∼100% recoveries for all three analytes. The developed method has been further applied in the investigation of the peroxide scavenging activity of UA.


Publication: RSC Adv 2022 Jun;12(29):18709-18721.
Publication Date: Jun 2022
Study Author(s): Rattanaumpa Tidapa T ; Maensiri Santi S ; Ngamchuea Kamonwad K ;
Institution: School of Chemistry, Institute of Science, Suranaree University of Technology 111 University Avenue, Suranaree, Muang Nakhon Ratchasima 30000 Thailand [email protected] +66 (0) 44 224 637.
Shortcut link to this study:
Herein, we demonstrate the superior electrocatalytic activities of microporous carbon in the oxidation of three molecular biomarkers, ascorbic acid (AA), dopamine (DA), and uric acid (UA), which are co-present in biological fluids. The voltammetric responses of AA, DA, and UA at the low-cost microporous carbon electrode show significantly better sensitivity and selectivity than other more expensive and commonly used electrode materials such as copper(ii) oxide, copper(i) oxide, and carbon nanotube. Differential pulse voltammetry at the microporous carbon electrode allows the detection of AA, DA, and UA with linear ranges of 100-2000 μM (AA), 10-150 μM (DA), and 10-150 μM (UA), sensitivities of 6.8 ± 0.2 nA μM-1 (AA), 261.4 ± 3.4 nA μM-1 (DA), and 93.5 ± 2.0 nA μM-1 (UA), and detection limits of 23.1 μM (AA), 0.2 μM (DA), and 1.7 μM (UA). The method has been validated with a synthetic urine sample to yield ∼100% recoveries for all three analytes. The developed method has been further applied in the investigation of the peroxide scavenging activity of UA.

PMID: 35873328

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