Yu Chao, Liu Guohong, Zuo Boli, Tang Yongjun, Zhang Tian
Analytical Center, Institute of Chemical Defense, 102205 Beijing, PR China.
Anal Chim Acta. 2008 Jun 23;618(2):204-9. doi: 10.1016/j.aca.2008.05.002. Epub 2008 May 8.
A cataluminescence (CTL) sensor using Al2O3 nanowires as the sensing material was developed for the determination of trace pinacolyl alcohol in air samples based on the catalytic chemiluminescence (CL) of pinacolyl alcohol on Al2O3 nanowires. Eight catalysts were examined and the CL intensity on Al2O3 nanowires prepared by supercritical fluid drying was the strongest. This novel CL sensor showed high sensitivity and selectivity to gaseous pinacolyl alcohol at optimal temperature of 340 degrees C. Quantitative analysis was performed at a wavelength of 460 nm. The linear range of CTL intensity versus concentration of gaseous pinacolyl alcohol was 0.09 x 10(-6) to 2.56 x 10(-6) g mL(-1) (r=0.9983, n=6) with a detection limit (3 sigma) of 0.0053 x 10(-6) g mL(-1). None or only very low levels of interference were observed while the foreign substances such as water vapor, ethanol, ammonia, chloroform, benzene, nitrogen dioxide, methylbenzene, hydrochloric acid, methanol and butanol were passing through the sensor. The response time of the sensor is less than 100 s, and the sensor had a long lifetime more than 60 h. The sensor would be potentially applied to analysis of the nerve agents such as Soman.
基于频哪醇在Al2O3纳米线上的催化化学发光（CL），开发了一种以Al2O3纳米线为传感材料的催化发光（CTL）传感器，用于测定空气样品中的痕量频哪醇。考察了8种催化剂，超临界流体干燥法制备的Al2O3纳米线上的CL强度最强。在340℃的最佳温度下，这种新型CL传感器对气态频哪醇具有高灵敏度和选择性。在460nm波长下进行定量分析。CTL强度与气态频哪醇浓度的线性范围为0.09×10(-6)至2.56×10(-6)g mL(-1)（r=0.9983，n=6），检测限（3σ）为0.0053×10(-6)g mL(-1)。当水蒸气、乙醇、氨、氯仿、苯、二氧化氮、甲苯、盐酸、甲醇和丁醇等外来物质通过传感器时，未观察到干扰或仅观察到极低水平的干扰。该传感器的响应时间小于100s，寿命长达60h以上。该传感器有望应用于梭曼等神经毒剂的分析。
