Shanghai gas chromatograph manufacturerinstrumentWidely used in petroleum, chemical, biochemical, pharmaceutical and health, food industry, environmental protection, energy and gas industries.

　　Shanghai gas chromatograph manufacturerinstrumentCharacteristics:

1. The host comes with a two-way valve control system, which facilitates online automatic sampling.

2. The inter column compensation circuit electronically compensates for baseline drift during program temperature rise, reducing the complexity caused by the second column, detector, and auxiliary flow system.

3. The signals from the detector, heater values, furnace temperature, flow sensor readings, or stored column compensation baseline signals can all be assigned to a simulated output channel.

4. Self testing and fault diagnosis, experimental data stored for power-off protection, stopwatch and running timer, keyboard locking function.

　　Precautions for using the instrument:

1. Operate according to the instructions in the instrument manual

When inspecting instruments, it is not only necessary to check whether all components are complete, but also to check whether the instrument manual is complete and properly store these materials. Before operating the instrument independently, it is necessary to carefully read the relevant instructions and strictly follow the procedures. This is a prerequisite for good instrument analysis, and once there is a problem with the instrument, it is also easy to negotiate with the manufacturer.

2. Use carrier gas with the required purity

The carrier gas must be of high purity to avoid interfering with the analysis and contaminating the chromatographic column or detector. You should know that the price of a chromatographic column is more than 20 times the price of a bottle of high-purity nitrogen or hydrogen. If ordinary gas is used as a carrier gas to save money, it may be because watermelon is lost and sesame is picked. The auxiliary gas used for the detector is also high-purity grade. Although ordinary gas can be used when sensitivity requirements are not high, the cost may be contamination of the detector. Replace the chromatographic column gasket in a timely manner.

3. Prepare a chromatographic column test standard sample

The performance of the chromatographic column is the key to ensuring the analysis results. The newly purchased chromatographic column should first be evaluated for its performance using test samples. If the test conditions provided by the chromatographic column manufacturer do not meet the requirements, a return or exchange can be requested. More importantly, the performance of the chromatographic column will change during subsequent use. When there are problems with the analysis results, a test standard can be used to test the chromatographic column and compare the results with the previous test results. This helps determine whether the problem lies in the chromatographic column, so that appropriate measures can be taken to eliminate the fault.

4. Timely replace the graphite sealing gasket

Leakage of graphite gaskets is one of the most common faults in gas chromatographs. Never reuse the same sealing gasket on different columns. Even if the same column is removed and reinstalled, the sealing gasket should be replaced to ensure higher work efficiency. If gas leakage is found after installing the chromatography column and the sealing gasket is replaced, it will take more time. Even if the old gasket can still be used, it needs to be tightened more than before. If it is not done properly, the capillary chromatography column will be broken.