Ion chromatography system for controlling double-conductance-cell series technology through virtual instrument

Abstract

The invention discloses an ion chromatography system for controlling a double-conductance-cell series technology through a virtual instrument. The system comprises an ion chromatography separation module fixed to an ion chromatography instrument, a suppressor flow path module, a conductance cell series module, an ion chromatography interface equipment card inserted into a microcomputer PCI slot, and a software measurement and control module located in a microcomputer. A specific analog or digital circuit in a traditional ion chromatography instrument is obtained through a software program to complete measuring and testing functions, noise can be greatly lowered, the signal to noise ratio is increased, and the measuring result is more precise. Samples with large concentration differences are tested at a time through the double-conductance-cell series technology, the temperature is unified, and measuring precision is improved. It is not needed to carry out high-concentration ion pretreatment on the samples with the large concentration differences, analysis time is shortened, measuring efficiency is improved, and the detection and operation cost is reduced.

Description

technical field [0001] The invention relates to an ion chromatographic system, in particular to an ion chromatographic system using a virtual instrument to control the series technology of double conductance cells. Background technique [0002] Ion chromatography is a new type of liquid chromatography developed after the 1970s. The technology has developed rapidly and has become a powerful tool for the separation and detection of different anions and cations. At present, the known ion chromatograph is composed of six major parts, including a high-pressure pump, an injection valve, a separation column, a suppression unit, a conductivity detection unit, and a data processing unit. In conventional ion chromatography analysis, the components to be measured flow out with the mobile phase after separation and suppression, and then enter the conductivity detection cell for determination. The conductivity detection cell continuously measures the concentration of the eluted part in...

AI Technical Summary

Problems solved by technology

However, the cost of using the pretreatment method is high, and it is a one-time use consumable, and the detection cost is too high for long-term use; while using the two-step method to measure sample ions, with the difference in the ambient temperature of the instrument every time, it will cause Changes in the detection signal, such as baseline drift, once the drift exceeds a certain value, it will affect the detection results of the ion chromatograph

Images