Determination of organophosphate flame retardant tris(2-chloroethyl)phosphine based on the luminol-H2O2 chemiluminescence system

Organophosphorus flame retardants (OPFRs) are new types of environmental pollutants, therefore the rapid and sensitive detection of OPFRs is a very important objective. A new experimental phenomenon was found in which tris(2-chloroethyl)phosphine (TCEP), a type of OPFR, could effectively enhance the signal of the luminol-H2O2 chemiluminescence (CL) system. Combined with the controllability of flow injection analysis, a rapid, stable, and sensitive CL method was established. The CL intensity responded linearly to the concentration of TCEP in the range 0.5-100 mu g/L (R-2 = 0.999) with a low detection limit of 33 ng/L. Relative standard deviation (RSD) was 2.2% (n = 7, c = 100 mu g/L). Water samples were labelled and recycled with RSDs of 1.1-5.7% and recoveries of 88.7-116.1%. Based on these results, this study established a new CL detection method for the environmental pollutant TCEP.

Automated summary

This study discovered the enhancing effect of TCEP on the luminol-H2O2 chemiluminescence system and established a rapid, stable, and sensitive detection method using flow injection analysis. The method showed linear response to TCEP concentration with low detection limit and good recoveries, making it a promising approach for environmental pollutant detection.