Zeolite-based cataluminescence sensor for the selective detection of acetaldehyde.
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.
Yang
Ping
P
Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China.
Lau
Choiwan
C
Liang
Jian-Ying
JY
Lu
Jian-Zhong
JZ
Liu
Xia
X
D000079:Acetaldehyde / Q000032:analysis*; D002384:Catalysis; D004566:Electrodes; D008163:Luminescent Measurements / Q000295:instrumentation* / Q000379:methods; D010316:Particle Size; D012680:Sensitivity and Specificity; D013696:Temperature; D013997:Time Factors; D017641:Zeolites / Q000737:chemistry*
D017641:Zeolites; D000079:Acetaldehyde