Device and method for measuring chlorine elements in water in real time

Abstract

The invention relates to the technical field of water detection and in particular relates to a device and a method for measuring chlorine elements in water in real time. The device comprises a water supply unit, a detection chamber, a laser driving unit, a spectra collection unit and a system control unit, wherein the water supply unit is communicated with the detection chamber; a laser transmitting head and a spectra receiving head are arranged in the detection chamber; the laser driving unit is connected with the laser transmitting head; the spectra collection unit is connected with the spectra receiving head; and the system control unit is connected with the laser driving unit and the spectra collection unit. The method comprises the following steps: directly introducing a to-be-measured water body into the detection chamber, exciting chlorine elements in the water body into a plasma state by utilizing high-energy laser, measuring the atomic emission spectroscopy, and measuring the chlorine elements in the water by virtue of the atomic characteristic spectrum of the chlorine elements. According to the method, manual sampling is not needed, pretreatment is avoided, the total chlorine content in the water can be rapidly measured, real-time measurement can be realized, high sensitivity is achieved, secondary pollution is avoided, and the operation is simple and rapid.

Description

technical field [0001] The invention relates to the technical field of water body detection, in particular to a real-time measuring device and method for chlorine in water. Background technique [0002] At present, there are many methods for the detection of chloride ions, which can be summarized as follows: [0003] 1. Reversed phase high performance liquid chromatography, the detection limit is 0.01mg / L. Its detection mechanism is based on the theory of solvent repellency, when solute molecules enter the polar mobile phase, they occupy the corresponding space in the mobile phase and exclude a part of solvent molecules. When the solute molecules are pushed by the mobile phase to contact with the fixed phase, the non-polar part or non-polar factors of the solute molecules will push away the solvent film attached to the non-polar inter-phase fixed phase, and directly contact with the non-polar fixed phase. The alkyl functional groups of the molecules are combined (adsorbed)...

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Problems solved by technology

[0012] For the above methods, although the reverse high-performance liquid chromatography has high sensitivity, the technology is complicated, the instrument is expensive, the sample must be pretreated, and real-time measurement cannot be realized; molar method, potentiometric titration method, and mercury salt titration method are several methods. The sensitivity is low, the reproducibility is poor, the error is large, and it is easily interfered by other ions (bromine, iodine, sulfur, etc.), and it cannot be measured online in real time; the co-precipitation enrichment spectrophotometry is complicated to operate, time-consuming and labor-intensive, and it cannot be measured in real time. On-line measurement; turbidimetric method has requirements on the pH value of water, must be in an acidic environment, and silver nitrate needs to be added, the detection is complicated, and the universality is poor; ion-exchange chromatography has different selectivities for different ions due to ion-exchange resins, so it is very difficult It is difficult to detect different forms of chlorine ions at the same time, let alone the combined chlorine element; the polarographic method is mainly limited by the accuracy and life of the polarographic electrode, which needs to be calibrated every one or two months, and the measurement speed is relatively slow. It can only measure ionic chlorine

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