Plasma emission detector is a universal detector with high sensitivity,it has a quartz cavity with a unique design for loading high-frequency voltage and electric fields,when the carrier gas carries the components separated by the chromatographic column through the quartz cavity,under the action of high voltage and high strength electromagnetic field,Ionization by a high voltage generator produces a fluorescence phenomenon called electroluminescence and emits a characteristic spectral line,Carrier gas and components were ionized to form a plasma.

Different components emit different wavelengths of light radiation in the plasma,The emission lines vary with different components in the carrier gas,The chromatographic signal obtained by filtering light and photoelectric conversion is proportional to the contents of the gas ，The optical signal generated by the detector is detected by the optical system,Optical systems include filters and photodiodes,Filters selectively filter out light signals based on wavelength,And converted into electrical signals through photodiodes,The signal is amplified to the extent required for analysis by a signal voltage amplifier.with this light-emitting technology to quantify the sample.