Selection of Components of a Used Gas Chromatograph

The purpose of purchasing the instrument is to do a good job in the internal supporting and matching of analytical instruments, and to combine them organically, to establish a detection method that suits our own use, to form a complete analytical system, and to ensure the smooth completion of the analytical wor.
So, what aspects should be paid attention to when selecting the components of a second-hand gas chromatograph? The basic structure of the second-hand gas chromatograph The basic structure of the gas chromatograph has two parts, namely the analysis unit and the display uni.
The former mainly includes gas system and control metering device, sampling system, thermostat and separation syste.
The latter mainly includes detection systems and signal recording or data processin.
Separation systems and detectors are the core components of a gas chromatograp.
Selection of components of second-hand gas chromatographs Selection of mainframe The mainframe of the instrument is the main body of the instrument and the basic carrier of each functional par.
If it does not have the function of assembling various parts and accessories that meet the detection target, it cannot complete the target analysis wor.
.Of course, choosing an instrument host with over-complete functions and over-configured configuration is unnecessary in future work, but it will be a trouble and wast.
Selection of sampling system The sampling method of the sample to be tested is also the key to the accuracy of the instrument detection dat.
For liquid samples, a micro injection needle is generally used; for trace gas component analysis, a six-port valve or ten-port valve with a quantitative sampling tube is generally used for sampling; for volatile substance analysis, headspace The injector is a nice standard featur.
However, not all imported gas chromatographs are equipped with special valve sampling device.
If you do not carefully examine the actual situation of the sampling system of the instrument before purchasing, and blindly believe in the integrity of the imported instrument, it will inevitably cause losse.
Selection of Detector System Detector is a key component of gas chromatograp.
There are more than ten kinds of detectors commonly use.
What kind of detector can be equipped with can accomplish what kind of wor.
There is no one-size-fits-all detecto.
When choosing a detector, you should carefully understand what functions each detector has, which components are suitable for detection, and the limitations of the use of such detector.
At the same time, you should also understand what kind of instrument host this detector should be equipped with, and what is the actual effect that can be achieved? Only in this way can the equipped detector achieve the purpose of detecting the measured component.
The main reason why gas chromatography is an excellent analytical method is that it has the function of first separating and then identifying various material component.
The separation function of the components to be tested is performed by a chromatographic separation colum.
Therefore, the choice of the chromatographic column is a key link related to whether the detected components can be detecte.
If the chromatographic column cannot separate the measured components (including known components and unknown components) one by one, the detector sensitivity is powerles.
For more complex material analysis projects, it is often necessary to equip multiple chromatographic columns to successfully complete an analysis work, which needs to be provided by trusted manufacturers or suppliers with considerable technical strengt.
Generally speaking, it is difficult for users to solve this configuration by themselve.