Liu G, Wang PL, Gao H. Visualization analysis of lecithin in drugs based on electrochemiluminescent single gold microbeads.
J Pharm Anal 2021;
11:515-522. [PMID:
34513128 PMCID:
PMC8424370 DOI:
10.1016/j.jpha.2021.02.002]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 01/19/2021] [Accepted: 02/06/2021] [Indexed: 11/24/2022] Open
Abstract
Fast and high-throughput determination of drugs is a key trend in clinical medicine. Single particles have increasingly been adopted in a variety of photoanalytical and electroanalytical applications, and microscopic analysis has been a hot topic in recent years, especially for electrochemiluminescence (ECL). This paper describes a simple ECL method based on single gold microbeads to image lecithin. Lecithin reacts to produce hydrogen peroxide under the successive enzymatic reaction of phospholipase D and choline oxidase. ECL was generated by the electrochemical reaction between a luminol analog and hydrogen peroxide, and ECL signals were imaged by a camera. Despite the heterogeneity of single gold microbeads, their luminescence obeyed statistical regularity. The average luminescence of 30 gold microbeads is correlated with the lecithin concentration, and thus, a visualization method for analyzing lecithin was established. Calibration curves were constructed for ECL intensity and lecithin concentration, achieving detection limits of 0.05 mM lecithin. This ECL imaging platform based on single gold microbeads exhibits outstanding advantages, such as high throughput, versatility and low cost, and holds great potential in disease diagnostics, environmental monitoring and food safety.
The ECL imaging strategy reflected the advantage of spatial resolution and high-throughput analysis of lecithin in drugs.
Micrometer-scale gold microbeads were easily synthesized by adding H2SO4 in Na3Au(SO3)2 solution.
The ECL spots exhibited the heterogeneity of single gold microbeads in ECL reaction.
ECL microscopic quantitative analysis for lecithin was established via single gold microbeads with PLD and COD.
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