AN AMPEROMETRIC ALGAL BIOSENSOR FOR HERBICIDE DETECTION EMPLOYING A CARBON CATHODE OXYGEN-ELECTRODE

被引：23

作者：

PANDARD, P

RAWSON, DM

机构：

[1] Applied Research and Consultancy Centre, Luton College of Higher Education, Luton, Bedfordshire, LU2 8LE, Hitchin Road

[2] Laboratoire de Toxicologie, Centre des Sciences de l'Environment, Metz, 57000

来源：

ENVIRONMENTAL TOXICOLOGY AND WATER QUALITY | 1993年 / 8卷 / 03期

关键词：

D O I：

10.1002/tox.2530080309

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A method is described for continuous monitoring of the photosynthetic oxygen evolution of the microalga Chlorella vulgaris, which was immobilized between alumina filters on the surface of a teflon-covered carbon electrode. Sensitivity of the algal biosensor to herbicides was tested using an electrochemical flow cell with illumination provided by light-emitting diodes. This configuration also allows the biosensor to be used in real-time environmental monitoring. The herbicides atrazine, isoproturon, and propanil were detected within 30 min at concentrations below 100 mug dm-3, while the herbicide bromoxynil was only detected after several hours at mg dm-3, concentrations. Good sensor stability was obtained in the absence of pollutants, with more than 24 h of continuous monitoring being achieved. (C) 1993 John Wiley & Sons, Inc.

引用

页码：323 / 333

页数：11

共 23 条

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