Water quality sample injecting method, analyzing method and device

Abstract

The invention relates to a sample injecting method, comprising the step of injecting a sample and a reagent into a sample injecting pipeline. The reagent comprises a carrying current, the carrying current pushes the sample out from the sample injecting pipeline, and the sample enters into a downstream sample injecting port. The invention also provides a water quality analyzing method and device. The invention has the advantages of accurate sample injecting and simple operation.

Description

technical field [0001] The invention relates to a water quality total carbon or organic carbon sampling and analysis method and device, in particular to a water total carbon / total organic carbon sampling, analysis method and device. Background technique [0002] Total carbon (TC) in water includes total inorganic carbon (TIC) and total organic carbon (TOC). Total organic carbon in water is a direct representation of the total content of organic matter based on the carbon content in the water sample, and is one of the comprehensive indicators for evaluating the degree of organic matter pollution in water quality. The common analysis steps of total carbon (or total organic carbon) are: first inject a certain volume of water sample into the reaction unit, perform oxidation treatment, convert the total carbon or organic carbon in the water sample into carbon dioxide, and then detect the reaction Generated carbon dioxide concentration, and then calculate the total carbon or orga...

AI Technical Summary

Problems solved by technology

[0007] 1) The injection volume depends on the volume of the quantitative chamber of the quantitative slide valve. For a certain type of quantitative slide valve, the volume of the quantitative chamber is fixed, and the quantitative volume cannot be adjusted, so that the injection volume cannot be adjusted. The measurement of changing the injection volume cannot be realized;

[0008] 2) For long-term use, pollutants will accumulate inside the quantitative chamber, making the quantitative volume inaccurate and affecting the analysis results. Therefore, the quantitative chamber needs to be cleaned regularly, which is inconvenient to use and maintain;

[0009] 3) When the sample is injected through the quantitative chamber, there will be residues on the inner wall of the sampling chamber, which makes the small volume injection inaccurate and further affects the accuracy of subsequent analysis results

[0014] 1) The injection volume depends on the volume of the quantitative loop. For the situation where the injection volume needs to be changed for measurement, the quantitative loop must be replaced manually, which is troublesome to operate;

[0015] 2) If there is a dead volume in the channel inside the solenoid valve, reagent residues are prone to occur, and the residual sample from the previous time is likely to interfere with the measurement of the next sample, thereby affecting the accuracy of the measurement result;

[0016] 3) When the sample is injected through the quantitative loop, there will be residues on the inner wall of the quantitative loop and the pipeline, which makes the small volume injection inaccurate and further affects the accuracy of subsequent analysis results

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