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

Chromium oxide (Cr(2)O(3)) nanoparticles were found to greatly enhance the chemiluminescence (CL) of the luminol-hydrogen peroxide (H(2)O(2)) 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 Cr(2)O(3) nanoparticle array on the CL reaction between lower concentrations of luminol and H(2)O(2), which come from hydrolysis of TATP vapor. The calibration curve of H(2)O(2) 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 (R(2) = 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.