Yang Ping, Lau Choiwan, Liang Jian-Ying, Lu Jian-Zhong, Liu Xia
Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China.
Luminescence. 2007 Sep-Oct;22(5):473-9. doi: 10.1002/bio.987.
The reactions of acetaldehyde with O atoms in the cages of large-pore zeolites have been discovered to result in light emission. The luminescence characteristics of acetaldehyde vapours passing through the surface of chosen zeolites were studied using a cataluminescence-based detection system. To demonstrate the feasibility of the method, the detection of acetaldehyde using catalysts was studied systematically and a linear response of 0.06-31.2 microg/mL acetaldehyde vapour was obtained. Methanol, ethanol, isopropanol, methylbenzene, chloroform, dichlormethane and acetonitrile did not interfere with the determination of acetaldehyde. Acetaldehyde vapour could also be distinguished from some homologous series such as formaldehyde, cinnamaldehyde, glutaraldehyde and benzaldehyde on this catalyst, possibly due to the stereoselectivity of the zeolite and its specific reaction mechanism. Moreover, acetaldehyde was quantified without detectable interference from formaldehyde in four artificial samples. Thus, this kind of cataluminescence-based sensor could be potentially extended to the analysis of volatile organic compounds in air, and the simple and portable properties of cataluminescence-based sensors could also make them beneficial in many areas of analytical science.
已发现乙醛在大孔沸石笼中与氧原子的反应会产生发光现象。使用基于催化发光的检测系统研究了乙醛蒸气通过选定沸石表面时的发光特性。为证明该方法的可行性，系统研究了使用催化剂检测乙醛的情况，获得了乙醛蒸气浓度在0.06 - 31.2微克/毫升范围内的线性响应。甲醇、乙醇、异丙醇、甲苯、氯仿、二氯甲烷和乙腈不干扰乙醛的测定。在该催化剂上，乙醛蒸气也可与一些同系物如甲醛、肉桂醛、戊二醛和苯甲醛区分开来，这可能是由于沸石的立体选择性及其特定的反应机理。此外，在四个人造样品中对乙醛进行了定量，未检测到甲醛的干扰。因此，这种基于催化发光的传感器有可能扩展到空气中挥发性有机化合物的分析，并且基于催化发光的传感器简单便携的特性也使其在分析科学的许多领域中具有优势。
