GasChromatograph (SQ-203 type) operation application instructions

SQ-203 gas chromatograph is a computerized multi-purpose instrument for constant and trace analysis. For gas and liquid and solid samples with a boiling point below 400°C, it can be analyzed in principle. Its main components are:

1. Gas circuit control system

The SQ-203 gas chromatograph is a dual gas system, as shown in Figure 1]_32. Before turning on the power, be sure to check whether the sealing of the gas circuit is good, whether the pipeline is clean, whether the efficiency of the purification pipe and whether the air flow is stable.

2. Sample injection system

SQ-203 Gas Chromatograph has two sampling methods. When the source of the gas sample is sufficient, the six-way valve can be used to inject the sample, and for the volatile liquid or solid or a small amount of gas sample, the micro sampler can be used to inject the sample.

3. Column

The basic type of SQ-203 Xenometer is only equipped with packed column connectors, and glass and stainless steel columns can be used. Or equipped with capillary column options, you can use a variety of capillary columns.

4. Detector

The basic type of SQ-203 chromatograph is equipped with thermal conductivity and flame ionization Detectors, in addition, it can also be equipped with electron capture and flame photometry Detectors.

5. Controller

It is used to control the temperature of each part of the instrument, the Detector voltage and the amplification and attenuation of the signal.

The structural representation of the SQ-203 gas chromatograph is shown in Figure II_33.

2. Operation steps (using a thermal conductivity Detector)

2. shutdown

Press the "FID" and "Reset" keys at the same time, and "Ready" will be displayed on the display. When the column temperature drops below 50°C, press the power switch once to power off the instrument, unplug the power plug, and finally turn off the load on the instrument. Air valve, close the pressure reducing valve and the switch of the steel cylinder.