Analytical Center, Institute of Chemical Defense, 102205 Beijing, People's Republic of China.
Luminescence. 2009 Sep-Oct;24(5):282-9. doi: 10.1002/bio.1097.
A novel cataluminescence (CTL) sensor using ZrO2 nanoparticles as the sensing material was developed for the determination of trace dimethylamine in air samples based on the catalytic chemiluminescence (CL) of dimethylamine on the surface of ZrO2 nanoparticles. The CTL characteristics and the different factors on the signal intensity for the sensor, including nanomaterials, working temperature, wavelength and airflow rate, were investigated in detail. The CL intensity on ZrO2 nanoparticles was the strongest among the seven examined catalysts. This novel CL sensor showed high sensitivity and selectivity to gaseous dimethylamine at optimal temperature of 330 degrees C. Quantitative analysis was performed at a wavelength of 620 nm. The linear range of CTL intensity vs concentration of gaseous dimethylamine was 4.71 x 10(-3) to 7.07 x 10(-2 )mg L(-1) (r = 0.9928) with a detection limit (3sigma) of 6.47 x 10(-4) mg L(-1). No or only very low levels of interference were observed while the foreign substances such as benzene, hydrochloric acid, methylbenzene, chloroform, n-hexane and water vapor were passing through the sensor. The response time of the sensor was less than 50 s, and the sensor had a long lifetime of more than 60 h. The sensor was successfully applied to the determination of dimethylamine in artificial air samples, and could potentially be applied to analysis of nerve agents such as Tabun (GA).
一种新型的敏化室温磷光（CTL）传感器，使用 ZrO2 纳米粒子作为传感材料，基于 ZrO2 纳米粒子表面上二甲胺的催化化学发光（CL），用于空气中痕量二甲胺的测定。详细研究了 CTL 特性和传感器信号强度的不同因素，包括纳米材料、工作温度、波长和气流率。在七种研究的催化剂中，ZrO2 纳米粒子上的 CL 强度最强。这种新型的 CL 传感器在 330°C 的最佳温度下对气态二甲胺表现出高灵敏度和选择性。在 620nm 波长下进行定量分析。CTL 强度与气态二甲胺浓度的线性范围为 4.71 x 10(-3) 至 7.07 x 10(-2)mg L(-1)（r = 0.9928），检测限（3sigma）为 6.47 x 10(-4)mg L(-1)。当苯、盐酸、甲苯、氯仿、正己烷和水蒸气等外来物质通过传感器时，几乎没有或只有很低的干扰水平。传感器的响应时间小于 50s，传感器的寿命超过 60h。该传感器成功应用于人工空气样品中二甲胺的测定，有望应用于塔崩（GA）等神经毒剂的分析。
