Journal
MICROCHEMICAL JOURNAL
Volume 181, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.microc.2022.107776
Keywords
Electrochemiluminescence; Sulfur quantum dot; Sensor; Dopamine; Resonance energy transfer
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Funding
- National Natural Science Foundation of China [22164004]
- Guangxi Science Foundation of China [2022GXNSFDA035069]
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An ultrasensitive electrochemiluminescence (ECL) sensor using sulfur quantum dots (SQDs) as the luminophore was developed for the determination of dopamine. The proposed method exhibits excellent specificity, low detection limit, and high sensitivity, making it applicable in the analysis of real samples and the improvement of human health.
Herein, an ultrasensitive electrochemiluminescence (ECL) sensor was established for the determination of dopamine using sulfur quantum dots (SQDs) as the luminophore. The detection mechanism highlights how dopamine can be oxidized into dopamine quinone (DQ) and quenches the ECL signal of SQDs. Under the optimized experimental conditions, the ECL signal of SQDs was used for the detection of dopamine in the linear range of 1 x 10(-10) to 1 x 10(-3) M with a detection limit of 2.5 x 10(-11) M (S/N = 3). The proposed method has excellent specificity, a low detection limit, and high sensitivity when applied in the analysis of real samples and is applicable in the development of novel ECL luminophores as well as the improvement of human health.
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