PAMS production

Measurement principle:

The VOCs online analyzer mainly includes a refrigeration unit, a sampling unit, and a detection unit. The refrigeration unit is a refrigeration machine that uses multiple refrigerants to cool down, with a temperature of up to -120 ° C. The main function of the refrigeration unit is to cool down the sampling unit and separation unit. The sampling unit includes an enrichment tube and a Nafion material removal tube. The external heating wire of the enrichment tube is tightly connected to the aluminum block, and its temperature is measured by PT-100 thermocouple and controlled by a temperature controller. The separation unit mainly refers to a capillary chromatography column, which is wrapped with a heating wire between the column support aluminum block, and the temperature is measured using a PT-100 thermocouple. All units can be individually controlled for temperature, such as heating the separation unit when cooling the enrichment tube. Fill the adsorption tube with adsorbent and connect it to a six way valve as a quantitative loop for injection. The temperature of the enrichment tube can be controlled, and the time required from -110 ° C to 220 ° C is only a few tens of seconds. The detector is FID and uses N₂As a tail blow.

Instrument features:

Using a refrigeration machine to achieve ultra-low temperature refrigeration avoids the drawbacks of using refrigerants such as liquid nitrogen, and can operate automatically for a long time;

Adsorption of atmospheric volatile organic compounds, particularly C2-C12 NMHCs, through enrichment tubes connected to the refrigeration rod of the refrigeration unit;

Using a single capillary column for simultaneous detection of C2-C12 NMHCspartVarious volatile organic compounds such as oxygen-containing compounds and halogenated hydrocarbons;

Compared with similar commercial instruments, it has stable time, good reproducibility, compact size, high time resolution, low operating cost, and easy operation, which can meet various outdoor observation needs indoors and outdoors.