On-line detection of atmospheric formaldehyde by a conductometric biosensor.
On-line detection of atmospheric formaldehyde by a conductometric biosensor.
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DOI：
10.1016/j.bios.2006.03.018
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发表时间：
2007-01
影响因子：
12.6
通讯作者：
F. Vianello;Raffaella Boscolo-Chio;S. Signorini;A. Rigo
中科院分区：
文献类型：
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作者：
F. Vianello;Raffaella Boscolo-Chio;S. Signorini;A. Rigo
在连续流动条件下，通过在线系统检测大气甲醛（CH 2 O），该系统包括用于将污染物连续转移到水溶液中的湿式洗涤器、含有固定化甲醛脱氢酶（FDH）的微反应器和电导传感器。用该系统可检测0.05- 2 ppm的空气中甲醛浓度，灵敏度为20μS/ppm。在此浓度范围内，固定化酶将所有采样的甲醛分子氧化为甲酸，避免了繁琐的校准程序。该传感器在室温下连续工作10 h/d，稳定性至少为3个月。
Atmospheric formaldehyde (CH2O) was detected under continuous flow conditions by an on-line system comprising of a wet scrubber for a continuous transfer of the pollutant to an aqueous solution, a micro-reactor containing immobilized formaldehyde dehydrogenase (FDH) and a conductometric transducer. By this system atmospheric formaldehyde concentrations in the range 0.05–2ppm were detected with a sensitivity of 20μS/ppm. In this concentration range the immobilized enzyme oxidized all the sampled formaldehyde molecules to formic acid, avoiding cumbersome calibration procedures. The operational stability of the biosensor was at least 3 months, working continuously 10h/day at room temperature.