Highly sensitive electrochemiluminescence determination of etamsylate using a low‐cost electrochemical flow‐through cell based on a tris(2, 2'‐bipyridyl)ruthenium(II)–Nafion‐modified carbon paste electrode

Abstract

A simple and sensitive electrochemiluminescence (ECL) method for the determination of etamsylate has been developed by coupling an electrochemical flow-through cell with a tris(2,2'-bipyridyl)ruthenium(II) (Ru(bpy)3(2+))-Nafion-modified carbon electrode. It is based on the oxidized Ru(bpy)3(2+) on the electrode surface reacting with etamsylate and producing an excellent ECL signal. Under optimized experimental conditions, the proposed method allows the measurement of etamsylate over the range of 8-1000 ng/mL with a correlation coefficient of r = 0.9997 (n = 7) and a limit of detection of 1.57 ng/mL (3σ), the relative standard deviation (RSD) for 1000 ng/mL etamsylate (n = 7) is 0.96%. The immobilized Ru(bpy)3(2+) carbon paste electrode shows good electrochemical and photochemical stability. This method is rapid, simple, sensitive and has good reproducibility. It has been successfully applied to the determination of the studied etamsylate in pharmaceutical preparations with satisfactory results. The possible ECL reaction mechanism has also been discussed.

Flow Injection Analysis-Based Electrochemiluminescence: An Overview of Experimental Design and Its Biosensing Applications

“…Rao et al developed Ru(bpy) 3 2+ -Nafion-modified carbon paste electrode (CPE) for FIA-ECL determination of etamsylate drug. 95 The typical house-made FIA-ECL instrumentation for etamsylate detection is shown in Fig. 11A.…”