A novel microarray chemiluminescence method based on chromium oxide nanoparticles catalysis for indirect determination of the explosive triacetone triperoxide at the scene

Abstract

Chromium oxide (Cr₂O₃) nanoparticles were found to greatly enhance the chemiluminescence (CL) of the luminol–hydrogen peroxide (H₂O₂) system. A novel microarray CL method was originally developed for the detection of triacetone triperoxide (TATP). The novel CL method was based on the outstanding catalytic effect of a Cr₂O₃ nanoparticle array on the CL reaction between lower concentrations of luminol and H₂O₂, which come from hydrolysis of TATP vapor. The calibration curve of H₂O₂ was linear over a range of 1.0 × 10⁻⁸ to 3.0 × 10⁻⁵ M with a detection limit of 1.6 × 10⁻⁹ M (R² = 0.9992, n = 12). The CL method has the advantages of being sensitive, selective, simple, time-saving, high-throughput, and shows good reproducibility. Therefore, these merits would make it easily popular.