Working Principle:
The instrument uses a dedicated chromatographic column combination, central cutting and blowback technology, and hydrogen flame ionization detector (FID) technology for the detection of benzene derivatives. After the sample is collected in the quantitative loop, the injection valve is switched, and the samples are separated in the chromatographic column under the drive of the carrier gas. Among them, benzene, toluene, ethylbenzene, xylene, styrene, and isopropylbenzene are separated in the pre column and enter the FID detector for separation. After switching positions, the heavy hydrocarbon components are backflushed and vented.

　　Instrument features:
Adopting the patented technology of center cutting and back blowing, directly measuring benzene, toluene, ethylbenzene, xylene, styrene, and isopropylbenzene;
Using a dedicated chromatographic combination, the sample is kept at 180 ℃ with no residue and high sensitivity;
The instrument has a power on self-test function, gas cut-off protection function, automatic restart function upon power failure, and alarm function to ensure system safety and robustness;
The FID detector has automatic ignition function and wide output, with a linear range of 10-7;
Using automatic electronic flow technology (EPC) to control carrier gas, air, and hydrogen with high precision (0.01psi), good repeatability and reproducibility;
The core components are all made of internationally renowned brands, with high reliability and long service life.

　　Application fields:
Petrochemical, spraying, printing and other discharge outlets or factory boundary online monitoring.

Typical spectrogram