Sample crosstalk prevention water quality monitoring device and detection method

Abstract

The invention discloses a sample crosstalk prevention water quality monitoring device and a detection method. The water quality monitoring device comprises a shell, a sampling device, a homogenizing device and a separating device. The shell is connected with the sampling device, the sampling device is fixedly connected with the homogenizing device, the separating device is communicated with the shell, a sampling groove is formed in the shell, and a sampling bottle is arranged in the sampling groove; a detection cavity is formed in the shell and is positioned on the upper side of the sampling groove. The sampling device comprises a water drawing pipe and a detection assembly, the upper end of the water drawing pipe is communicated with the detection cavity, the detection assembly is arranged in the detection cavity and comprises a detection plate, a light source plate and an injection pump, the detection plate and the light source plate are symmetrically arranged along the detection cavity, and the output end of the injection pump is communicated with the detection cavity. And an original conveying channel is cleaned by clean water, so that the detection precision is prevented from being influenced by crosstalk of the water sample.

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 for testing. Due to the limited detection capacity, only part of the water sample is drawn. When the salt substance...

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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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