An online sample dilution and neutralization test device

Abstract

The invention discloses an on-line sample dilution and neutralization test device which consists of a dilution device, a neutralizer, an instruction control device, a silica gel pipe and a control line, wherein an ultrapure water storage bottle and a sample bottle are connected to a peristaltic pump, an injection pump, a three-way mixer, an electric two-position four-way valve, a three-way mixer and the neutralizer through the dilution silica gel pipe; a control box is connected with the peristaltic pump, the injection pump, the three-way mixer, the electric two-position four-way valve and the neutralizer through the control main line in a control manner; automatic sample dilution and sample neutralization are completed on line through a pipeline and a circuit; samples are provided for a chromatographic analysis system to complete analysis. According to the on-line sample dilution and neutralization test device, the problem caused by ion pollution of an existing neutralization method is effectively solved; no suction pipe or no volumetric flask is used in the whole neutralization process any more, so that the pollution source is reduced, a precise value of experimental data measurement is guaranteed, and a reliable test condition is provided for research on ion chromatographic analysis of snow and ice samples.

Description

technical field [0001] The invention relates to the technical field of analytical chemistry, in particular to an online sample dilution neutralization test device. Background technique [0002] For the analysis of acid-base samples, strongly acidic or strongly alkaline samples often affect the analysis results or the choice of analysis methods, so the samples must be neutralized before analysis. The traditional neutralization method is chemical neutralization or resin neutralization. The sum method will introduce ion pollution during the implementation process, which will affect the results of the samples to be analyzed and make the results higher. [0003] Some samples have high pH and the concentration of the ion to be measured in the sample is relatively high, so they need to be diluted before analysis, and 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 cause C...

AI Technical Summary

Problems solved by technology

[0002] For the analysis of acid-base samples, strongly acidic or strongly alkaline samples often affect the analysis results or the choice of analysis methods, so the samples must be neutralized before analysis. The traditional neutralization method is chemical neutralization or resin neutralization. In the sum method, ion pollution will be introduced during the implementation process, which will affect the results of the samples to be analyzed and make the results higher

[0003] Some samples have high pH and the concentration of the ion to be measured in the sample is relatively high, so they need to be diluted before analysis, and 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 cause Change in sample concentration after dilution

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