Online sample diluting experiment device

Abstract

An online sample diluting experiment device comprises a liquid storage portion, a diluting portion and a control portion, wherein the liquid storage portion comprises an ultrapure water storage bottle and a sample bottle, and the diluting portion comprises an injection pump I, an injection pump II, a sample filter, a three-way mixer and an electric two-position four-way valve. The ultrapure water storage bottle 1 is connected with the injection pump I through a PE (polyethylene) pipe, the experiment sample bottle is connected with the injection pump II though a PE pipe, the injection pump I is connected with an electric two-position three-way valve, the injection pump II is connected with the electric two-position four-way valve, the three-way mixer is connected with the electric two-position three-way valve and the electric two-position four-way valve, an electric two-position six-way valve is connected with the electric two-position three-way valve, the electric two-position four-way valve, a chromatographic instrument system and a wastewater collecting vat, and the sample filter is arranged between the injection pump II and the electric two-position four-way valve. The online sample diluting experiment device has the advantages that a sample diluting function can be selected by controlling switching of circuits and the valves, so that concentration of ions to be detected in samples is reduced, analysis errors are decreased, reproducibility of an experiment method is guaranteed and sample analysis accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of analytical chemistry, in particular to an online sample dilution device. Background technique [0002] For the analysis of dirty and high-concentration atmospheric aerosol, lake water, river water and other samples, the particulate matter and high concentration in the sample often affect the analysis results or the choice of analysis method, so the sample must be pre-treated before analysis. The traditional method The treatment method will introduce ion pollution during the implementation process, which will affect the results of the samples to be analyzed, make the results higher, the operation is not standardized, the error is large, and it is time-consuming and labor-intensive. [0003] Some turbid high-concentration samples have a relatively high concentration of the ion to be measured, which needs to be diluted before analysis. It is troublesome to operate offline. changes in sample concentration....

AI Technical Summary

Problems solved by technology

[0002] For the analysis of dirty and high-concentration atmospheric aerosols, lake water, river water and other samples, the particulate matter and high concentration in the sample often affect the analysis results or the choice of analysis methods, so the samples must be pre-treated before analysis. Traditional methods The treatment method will introduce ion pollution during the implementation process, which will affect the results of the samples to be analyzed, make the results higher, the operation is not standardized, the error is large, and it is time-consuming and labor-intensive.

[0003] Some turbid high-concentration samples have a relatively high concentration of the ions to be measured and need to be diluted before analysis. The operation is troublesome in offline analysis. If the pipette or volumetric flask used in the dilution process is polluted or not cleaned, it will directly lead to dilution Changes in sample concentration

Images