Peroxyacetyl nitrate PAN: an important secondary pollutant that poses a hazard to photochemical smog. PAN has no natural sources, only anthropogenic sources, and its precursors are nitrogen oxides and acetaldehyde in the atmosphere. Under the participation of light, acetaldehyde and OH radicals generate peroxyacetyl groups through O2, which then react with NO2 to obtain PAN. Therefore, the measurement of PAN in the atmosphere can be used as a basis for the occurrence of photochemical smog.

PAN is not only the main harmful substance that causes eye irritation in photochemical smog, but also a toxic agent for plants and a potential mutagen for skin cancer. Due to its dissociation into nitrate ions and organic matter in rainwater, it participates in the acidification of precipitation.

Can be continuously measuredPAN、PPNLow detection limit,PANThe detection limit can reachpptLevel.

The system comes with a standard gas synthesis unit, which can be programmed to achieve regular multi-point automatic calibration to ensure the accuracy of measurement data.

useEPCTechnology is used to control the pressure of the carrier gas, with precise and stable pressure control, and higher accuracy than±0.05kPaAnd it can also achieve program pressure control.

Using a mass flow meterMFCTechnology for standard gas flow control, with flow control accuracy better than0.5%F.S.Not affected by changes in environmental temperature and pressure.

beltTECThe micro column box for refrigeration can keep the column temperature constant at12℃, temperature control progress due to ±0.2℃, effectively avoidingPANDecompose due to thermal instability.

ImportedVALCOElectromagnetic six way valve, low maintenance, long service life, ensuring measurement repeatability.

Adopting a modular approachECDDetector, linear range reached104At the same time, it has an automatic blowing function to avoid contamination of the radioactive source, which is convenient, safe and reliable.

Built in standard industrialPCMachine, high-definition color LCD touch screen, using excellent human-computer interaction control software interface, based on Microsoft Windows operating system, can achieve automatic unmanned operation of the entire system. All maintenance and diagnostic functions can be completed using the touch screen, and instrument parameters and analysis methods can be edited and set. Real time display of instrument operating status, chromatograms, and results can also be achieved. Automatically store data and graphs, with a storage time of up to6-8Year.

19Standard chassis, compact structure, can be integrated with instruments of the same type and installed in vertical cabinets, occupying a small area, and convenient for daily maintenance and operation.

Monitoring components:PAN、PPN、MPAN

Quantitative ring volume:1ml

Auxiliary equipment: Calibration unit (online generation of standard gas), zero gas module (providing dilution gas)

Working temperature:5-35℃

Weight:19"Cabinet, approximately28Kg