A water quality monitoring device and detection method for preventing sample crosstalk

Abstract

The invention discloses a water quality monitoring device and a detection method for preventing sample crosstalk. The water quality monitoring device includes a housing, a sampling device, a homogenization device and a separation device. The housing is connected to the sampling device, and the sampling device is fastened to the homogenization device. , the separation device communicates with the housing, the housing is provided with a sampling tank, the sampling bottle is placed in the sampling tank, the housing is provided with a detection chamber, the detection chamber is located on the upper side of the sampling tank, the sampling device includes a water pipe and a detection assembly, The upper end of the water pipe communicates with the detection chamber, and the detection assembly is placed in the detection chamber. The detection assembly includes a detection board, a light source board and a syringe pump. The detection board and the light source board are arranged symmetrically along the detection chamber. The water cleans the original conveying path to prevent crosstalk of water samples, thus affecting the detection accuracy.

Description

technical field [0001] The invention relates to the technical field of water quality monitoring, in particular to a water quality monitoring device and a detection method for preventing sample crosstalk. Background technique [0002] Most of the ammonia nitrogen in water is ammonia in the form of free ammonia or ammonium salt. The degree of organic pollution in water is mainly based on the content of nitrogen compounds. The degree of water pollution can be detected by measuring the content of nitrogen compounds. [0003] However, when the salt concentration in the water sample to be tested is high, it is easy to cause salt precipitation and precipitation due to environmental fluctuations and temperature fluctuations. When sampling, the water sample to be tested is usually put into the sampling bottle, and then The water sample in the sampling bottle is sampled and tested. Due to the limited detection capacity, only part of the water sample is drawn. When the salt substance ...

AI Technical Summary

Problems solved by technology

[0003] However, when the salt concentration in the water sample to be tested is high, it is easy to cause salt precipitation and precipitation due to environmental fluctuations and temperature fluctuations. When sampling, the water sample to be tested is usually put into the sampling bottle, and then Sampling of water samples in sampling bottles

Due to the limited detection capacity, only part of the water sample is drawn. When the salt substance is deposited at the bottom of the sampling bottle, the sample drawn through the pipeline cannot uniformly sample the precipitated salt, which will easily lead to inaccurate sampling and thus affect the sampling accuracy.

[0004] In addition, ammonia nitrogen is mostly detected by electrode method or photometric method. When detecting by photometric method, the precipitated salts are likely to affect the absorbance detection, thereby affecting the detection accuracy.

In order to meet the requirements of fast detection and detection accuracy, the detection waterway needs to be cleaned frequently to prevent crosstalk caused by water samples of different concentrations. In order to prevent components in the outside air from entering the detection space, the detection space is often sealed and inconvenient to clean, which will affect the detection. efficiency

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