A Rapid and Sensitive Ether Sensor Utilizing Thermal Desorption Coupled with Cataluminescence

Abstract

A rapid and sensitive cataluminescence (CTL)-based gas sensor using nanosized Y2Zr1.5O6 as a probe was proposed for direct determination of ether in air. Trace ether was firstly absorbed on active carbon at room temperature to concentrate, then desorbed at 65°C to determine. The sensor showed high selectivity to ether at wavelength of 510nm, satisfying activity at temperature of 310°C and good stability at carrier flow rate of 110 ml/min. The linear range of CTL intensity versus concentration of ether was 2~100 mg/m3, and the detection limit (3σ) was 1.1 mg/m3. The recovery of artificial sample was 95.4%—106.7% by this method. The response to formaldehyde, benzene, NH3 and ethanol was insignificant, and there was no response to SO2, CO and acetone. The technique is a convenient and fast way of determining ether in air.

Cataluminescence‐based sensors: principle, instrument and application

“…This system utilizes thermal desorption for concentration of the sample and the adsorbent in the adsorption tube can be replaced. When active carbon is employed as the adsorbent under optimized conditions, the present system exhibits a broad linear range of 0.026–1.30, 2.5–150, 2–100, 4.025–201.25 and 0.3–75 mg/m 3 with a limit of detection of 0.01,1.2, 1.1, 1.34 and 0.1 mg/m 3 for the detection of formaldehyde , acetone , ether , butanone and benzene , respectively. When using Tenax‐GR as the adsorbent, the linear range of the CTL sensor versus trichloroethylene gas concentration was 14.7–586.0 mg/m 3 , with a detection limit of 4.9 mg/m 3 .…”