An ethyl acetate sensor utilizing cataluminescence on Y2O3 nanoparticles

A cataluminescence (CTL) sensor using Y2O3 nanoparticles as the sensing materials was proposed for the determination of ethyl acetate. This ethyl acetate sensor showed high sensitivity and specificity at the optimal temperature of 264 degrees C. Quantitative analysis was performed at a wavelength of 425 nm. The linear ranges of CTL intensity vs ethyl acetate concentrations were 2.0-250 ppm (r = 0.9965) and 250-6500 ppm (r = 0.9997) with a detection limit (3 sigma) of 0.5 ppm. There was no response or weak response when foreign substances such as formic acid, n-hexane, toluene, acetic acid, benzene, and formaldehyde passing through the surface of Y2O3 nanoparticles. The sensor had a long lifetime more than 80 h with 3600 ppm ethyl acetate. It had been applied successfully to determine ethyl acetate in artificial air samples. Copyright (C) 2009 John Wiley & Sons, Ltd.