文献类型：期刊文献

英文题名：Identification and determination of formaldehyde, benzene and ammonia in air based on cross sensitivity of cataluminescence on single catalyst

作者：Kaowen Zhou[1]; Jichao Xu[1]; Chunxiu Gu[1]; Baining Liu[1]; Zhaokuai Peng[1]

第一作者：周考文

机构：[1] Biochem. Eng. Coll., Beijing Union Univ., Beijing, China

第一机构：北京联合大学生物化学工程学院

年份：0

卷号：246

起止页码：703-9

外文期刊名：Sensors and Actuators B: Chemical

收录：EI(收录号：17006075)

语种：英文

外文关键词：ammonia - catalysts - chemiluminescence - gas sensors - nanosensors - organic compounds

摘要：A cataluminescence (CTL) based method for simultaneously identifying and determining formaldehyde (HCHO), benzene (C6H6) and ammonia (NH3) in air was proposed. CTL is emitted from the surface of nano-sized Ti2YAl3O10 contained in a CTL reactor. Three analysis wavelengths of 350 nm, 440 nm and 560 nm were selected. The surface temperature of sensing materials was 340 °C. The flow rate of air carrier was 140 mL/min. The limits of detection were 0.07 mg/m3 for HCHO, 0.10 mg/m3 for C6H6 and 0.15 mg/m3 for NH3. The linear ranges of CTL intensity versus analyte concentration were 0.2-66.4 mg/m3 for HCHO, 0.5-71.5 mg/m3 for C6H6 and 0.5-63.8 mg/m3 for NH3. The recoveries of 10 testing standard samples was 97.5%-103.1% for HCHO and 96.8%-102.8% for C6H6 and 98.1%-103.7% for NH3. Common coexistence matters, such as acetaldehyde, toluene, ethyl benzene, methylamine, ethylamine, methanol, ethanol, sulfur dioxide, hydrogen sulfide and carbon dioxide, did not disturb the determination. The relative deviation of CTL intensities was less than 3% for continuous 200 h detection, which demonstrated the longevity and steady performance of nano- Ti2YAl3O10 to HCHO, C6H6 and NH3. [All rights reserved Elsevier].