Introduction to the applicable places and system characteristics of non-methane total hydrocarbon analyzers

The non-methane total hydrocarbon analyzer uses high-temperature hydrogen flame ionization (HFID) method to detect the sample gas. In order to minimize the influence of sample gas condensation on the measurement accuracy, the instrument uses a full-process high temperature of 191 ℃ for sampling, and at the same time uses a compensated air bypass system to prevent sample gas condensation at the back pressure regulator.

The three precautions for the use of non-methane total hydrocarbon analyzer are as follows

Pay attention to the high concentration of the instrument: if the test is carried out in high concentration occasions, the user should try to avoid long-term detection, because the high concentration occasions will bring certain damage to the test parts of the instrument.

Take a closer look at the specific operation method of the secondary thermal analyzer!

Main functions and characteristics of secondary thermal analyzer

What You Should Know About Automatic Headspace Sampler

Automatic headspace sampler is a convenient and quick sample pretreatment method in gas chromatography. Its principle is to put the sample to be tested into a closed container, volatilize the volatile components from the sample matrix by heating, reach equilibrium in the gas-liquid (or gas-solid) two-phase, directly extract the top gas for chromatographic analysis, so as to check the composition and content of the volatile components in the sample.

The maintenance of the automatic headspace sampler is mainly divided into these five steps.

Enter the debugging mode in the automatic headspace sampler workstation, slide down to the three-axis area of the injection needle, click "Replace Injection Needle", after the three-axis injection needle moves to the injection needle replacement position, loosen the thread of the injection needle with a 6mm wrench, take out the injection needle, take out the new injection needle and the pressure ring, insert the pressure ring into the injection needle nut with the pressure ring facing outward, and install the new injection needle. After tightening by hand, use a 6mm wrench to screw another half circle, and the injection needle will be replaced.