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CHEMILUMINESCENT DETECTION OF CHLOROPHENOLS WITH A FIBER OPTIC SENSOR

机译：光纤传感器化学发光检测氯酚

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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 enhancer 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 μM to 100 μM. 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.
机译：提出了一种化学发光检测卤代酚的新方法。它基于某些取代酚增强辣根过氧化物酶催化的鲁米诺化学发光反应的能力。增强的强度取决于所采用的特定增强剂，还取决于增强剂的浓度。利用这些增强剂的特性，已开发出涉及光纤传感器和固定化过氧化物酶的卤代酚的流动注射分析（FIA）方法。由于氯酚的毒性和在环境中的持久性，我们主要致力于氯酚的检测。反应介质的组成已经优化。在所测试的十种氯酚中，其中六种可以通过本方法测定，检测限范围为0.5μM至100μM。对4-氯-3-甲基苯酚获得了最大的灵敏度，而对其他传感器，灵敏度则按以下顺序降低：4-氯苯酚> 2,4-二氯苯酚> 2-氯苯酚= 3-氯苯酚> 2.4,5-三氯苯酚。该化学发光方法无法检测到五氯苯酚，2,4,6-三氯苯酚，2,6-二氯苯酚和2-氨基-4-氯苯酚。

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