On-site multi-spot water-sample sampling device and COD (chemical oxygen demand) content detection method

Abstract

The invention relates to the technical field of spectrum detection, in particular to an on-site multi-spot water-sample sampling device and a COD (chemical oxygen demand) content detection method. The device comprises a submarine-type armature device, a sampling device and a remote control device. The method comprises the steps of (a) preparation of equipment, (b) sampling, (3) multi-point sampling, wherein the step (b) is repeated until all samples in a sampling chamber are taken, (d) sample recycling and (e) spectrum detection. Accurate advancing information and position information of the submarine-type armature device can be obtained in a water body, the device is more convenient to operate and control, and the COD content distribution condition of the water body can be measured more accurately; multiple samples can be collected after the device is launched once, and the collection efficiency is high; the COD content of the water body can be quickly and accurately measured through spectra, and no second pollution is caused to the water body.

Description

technical field [0001] The invention relates to the technical field of spectrum detection, in particular to an on-site multi-point sampling device for water samples and a COD content detection method. Background technique [0002] When evaluating water pollution, chemical oxygen demand (COD) is an important indicator to measure the degree of organic pollution in water. Many related studies have shown that when the concentration of COD in water exceeds a certain limit, it will affect water quality. And the growth of aquatic products will have a negative impact, and will increase the cost of water treatment. Therefore, it is of great practical significance to quickly detect the COD concentration in water. Traditional COD determination methods include potassium dichromate titration and rapid digestion spectrophotometry, etc. New methods such as electrochemical methods and flow injection analysis are also used for COD measurement, but these methods have long analysis time an...

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Problems solved by technology

[0002] When evaluating water pollution, chemical oxygen demand (COD) is an important indicator to measure the degree of organic pollution in water. Many related studies have shown that when the concentration of COD in water exceeds a certain limit, it will affect water quality. and the growth of aquatic products will cause negative impacts, and will increase the cost of water treatment. Therefore, it is of great practical significance to quickly detect the COD concentration in water.

Traditional COD determination methods include potassium dichromate titration and rapid digestion spectrophotometry, etc. New methods such as electrochemical methods and flow injection analysis are also used for COD measurement, but these methods have long analysis time and consume Reagents, secondary pollution and other risks, taking into account the accuracy of the measurement data, convenient operation and environmental protection and non-polluting characteristics, the use of spectroscopy technology to replace conventional chemical analysis methods has been applied to a certain extent

At present, water samples can only be collected at one point at a time, and it is impossible to sample multiple points at the same time, and the depth information of the sampling cannot be determined. The representativeness of the water samples collected by this sampling method is insufficient, which can guide the production practice. limited

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