Chemiluminescent detection of chlorophenols with a fiber optic sensor

被引:0
|
作者
Blum, LJ [1 ]
Degiuli, A [1 ]
机构
[1] Univ Lyon 1, CNRS, UPRESA 5013, Lab Genie Enzymat, F-69622 Villeurbanne, France
来源
BIOSENSORS FOR DIRECT MONITORING OF ENVIRONMENTAL POLLUTANTS IN FIELD | 1997年 / 38卷
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D O I
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中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
A new method for the chemiluminescent detection of halophenols is presented. It is based on the ability of certain substituted phenols to enhance the chemiluminescence reaction of luminol catalyzed by horseradish peroxidase. The magnitude of enhancement depends on the particular enhancer employed and also on the enhancement concentration. Taking advantage of the properties of these enhancers, a flow injection analysis (FIA) method for halophenols involving a fiber optic sensor and immobilized peroxidase has been developed. We mainly focussed on the detection of chlorophenols due to their toxicity and persistence in the environment. The composition of the reaction medium have been optimized. Among the ten chlorophenols tested, six of them could be determined with the present method with a detection limit varying from 0.5 mu M to 100 mu M. The greatest sensitivity was obtained for 4-chloro-3-methylphenol whereas for the others the sensitivity decreased according to the following order : 4-chlorophenol > 2,4-dichlorophenol > 2-chlorophenol = 3-chlorophenol > 2,4,5-trichlorophenol. Pentachlorophenol, 2,4,6-trichlorophenol, 2,6-dichlorophenol and 2-amino-4-chlorophenol could not be detected by this chemiluminescent method.
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页码:271 / 280
页数:10
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