Total arsenic online monitoring device in water quality

Abstract

The invention discloses an on-line monitoring device for total arsenic in water quality. The on-line monitoring device comprises an embedded control system and a sampling pump system, a quantifying system, a multi-channel sample injection system, an expelling system and an absorbing and detecting system which are in sequential pipeline connection, wherein a control program is preset in the embedded control system and is used for controlling the sampling pump system, the quantifying system, the multi-channel sample injection system, the expelling system and the absorbing and detecting system to work; after the sampling pump system and the quantifying system carry out rational sampling, a reagent and a water sample to be tested are enabled to enter the expelling system through the multi-channel sample injection system and are subjected to oxidation reduction chemical reaction in the expelling system for unifying arsenics in various morphologies such as inorganic arsenic and organic arsenic into gaseous arsenide in one valence state; total arsenic subjected to chemical reaction is completely expelled and transferred to the absorbing and detecting system; the gaseous arsenide is absorbed and on-line detection for the total arsenic is carried out in the absorbing and detecting system; and the problem that the accuracy is influenced due to interference of water sample background is solved, the measuring accuracy is greatly improved and the application range for monitoring is widened.

Description

technical field [0001] The invention belongs to the technical field of on-line monitors, in particular to an on-line monitor suitable for the total arsenic content in water. Background technique [0002] Due to the harmfulness of arsenic pollution, it is becoming increasingly urgent to establish an early warning system for arsenic pollution to monitor arsenic pollution in real time, and the demand for on-line monitoring instruments for total arsenic has also become increasingly apparent in recent years. At present, on-line monitoring instruments for total arsenic basically rely on imports, and imported instruments are expensive. In order to break the high dependence on imported instruments and to solve the technical problems of online monitoring of total arsenic, many scientific and technological innovation enterprises have successively launched a series of online total arsenic monitors by increasing investment in scientific research, filling the domestic gap and ending the ...

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Problems solved by technology

It can solve the problem of accurate and rapid online monitoring of tot

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