Device for online fluorescence detection of bromates and application method of device

Abstract

The invention relates to a device for online fluorescence detection of bromates. The device comprises a liquid constant-flow system, a thermal reaction system, a reaction stopping system, a fluorescence detection system and a signal acquiring and processing system. The device for the online fluorescence detection of bromates is based on online heating and online control systems; the adding order and the equivalent weights of acid and base reagents are regulated online, the pH value of the reaction system is accurately controlled, the fluorescence quenching reaction is stopped immediately, and physical cooling for controlling the reaction speed is not needed; the device is simple and efficient to operate; besides, the problem of great difference of the cooling rates of the reaction liquid in different directions due to the physical cooling is avoided and the problem of poor fluorescence intensity change stability due to uneven reaction caused by physical cooling factors in the sample cooling stopping treatment during traditional fluorescence analysis is solved; the analysis efficiency is high and the analysis result is stable; the device can be applied to quick and accurate analysis of trace bromates in a sample to be tested.

Description

technical field [0001] The invention provides a device for on-line fluorescence detection of bromate and an application method thereof, belonging to the technical field of analytical chemical instruments and equipment. Background technique [0002] Bromate is carcinogenic, teratogenic, causes nephropathy and strong reproductive toxicity. The World Health Organization has banned the use of bromate in food and beverages. my country's raw water enterprises generally adopt the cheap and efficient ozone sterilization process, and bromate produced by the reaction of bromine-containing substances with ozone inevitably exists, resulting in the increasingly prominent problem of bromate residues. [0003] The content of bromate in drinking water is low, gas chromatography and liquid chromatography are detected after bromate is derivatized, and the operation is relatively cumbersome; at present, the detection of bromate in drinking water mainly uses ion chromatography-conductivity The...

AI Technical Summary

Problems solved by technology

However, the above-mentioned conventional detection instruments cannot directly carry out the online detection of bromate, and the samples must be processed offline, and the reaction system needs to be cooled for a long time after the completion of the reaction system. not good

[0004] At present, my country's National Standards Committee has set the limit value of bromate in drinking water as 0.01 mg / L. The existing fluorescence analysis instrument technology is difficult to effectively meet the needs of rapid detection of bromate in water. The market lacks effective monitoring methods, making bromine in water The problem of bromate has increasingly become a potential hidden danger of food safety, and it is urgent to develop a simple and practical online rapid monitoring instrument for bromate

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