Luftforurensing-kontinuerlig monitorering av aerosoler og gasser i luft

Luftkvaliteten er kritisk for både helse og miljø.

MARGA er en fullautomatisert prøvetaker og målesystem som kontinuerlig måler komponenter som har direkte effekt på luftkvaliteten.

MARGA air monitoring system

Verdt å merke seg

  • Gassmåling: HCl, HNO3, HNO2, SO2, NH3

  • Ioner i aerolsoler: CL-, NO3-, SO42-, NH4+, K+, Ca2+, Mg2+

  • Full rapportering av alle parametere etter en times prøvetaking.
  • En programvare som styrer hele systemet, inkluder prøvetaking og analyse
  • Analyse med ionekromatograf. Bruk av internstandard eliminerer kalibrering

MARGA systems (2)

2060 MARGA R – Air monitoring for research campaigns

A402060120C
The Monitor for AeRosols and Gases in Ambient air (MARGA) uses ion chromatography to monitor air quality by measuring the concentration of water-soluble gases and aerosols in air containing different sizes of particulate matter. Air is drawn in to the instrument by a vacuum pump at a constant flow rate. Before entering the instrument, the maximum size of particulate matter (PM) can be limited by utilizing a size-selective inlet (e.g. PM 1.0, PM 2.5 or PM 10). The water-soluble gases are absorbed in a Wet Rotating Denuder (WRD) device and then the water-soluble ions in the aerosols are extracted in a Steam-Jet Aerosol Collector (SJAC).A dual-channel ion chromatograph (IC) quantifies anions and cations in aerosols and water-soluble gases simultaneously with high accuracies to reach detection limits as low as 0.001 µg/m3.The analyzer’s performance can be remotely observed by using a direct internet connection to make adjustments when necessary and to access stored results. The 2060 MARGA R version is ideal for research campaigns: the IC can be used as a standalone lab instrument for other projects when not in use for 24/7 air quality monitoring.Data collection with a time resolution of 1h to study e.g. diurnal variation or trajectory models for pollution events.Remote control or touch screen to easily access results, trend graphs, and more.Gases measured: Hydrochloric Acid (HCl), Nitric acid (HNO3), Nitrous acid (HONO), Sulfur dioxide (SO2), Ammonia (NH3)Aerosol ions measured: Chloride (Cl-), Nitrate (NO3-), Sulfate (SO42-), Ammonium (NH4+), Potassium (K+), Calcium (Ca2+), Magnesium (Mg2+)

2060 MARGA M – Continuous air monitoring

A402060110C
The Monitor for AeRosols and Gases in Ambient air (MARGA) uses ion chromatography to monitor air quality by measuring the concentration of water-soluble gases and aerosols in air containing different sizes of particulate matter. Air is drawn in to the instrument by a vacuum pump at a constant flow rate. Before entering the instrument, the maximum size of particulate matter (PM) can be limited by utilizing a size-selective inlet (e.g. PM 1.0, PM 2.5 or PM 10). The water-soluble gases are absorbed in a Wet Rotating Denuder (WRD) device and then the water-soluble ions in the aerosols are extracted in a Steam-Jet Aerosol Collector (SJAC).A dual-channel ion chromatograph (IC) quantifies anions and cations in aerosols and water-soluble gases simultaneously with high accuracies to reach detection limits as low as 0.001 µg/m3.The analyzer’s performance can be remotely observed by using a direct internet connection to make adjustments when necessary and to access stored results. The 2060 MARGA M version is ideal for 24/7 continuous monitoring at a permanent site.Data collection with a time resolution of 1h to study e.g. diurnal variation or trajectory models for pollution events.Remote control or touch screen to easily access results, trend graphs, and more.Gases measured: Hydrochloric Acid (HCl), Nitric acid (HNO3), Nitrous acid (HONO), Sulfur dioxide (SO2), Ammonia (NH3)Aerosol ions measured: Chloride (Cl-), Nitrate (NO3-), Sulfate (SO42-), Ammonium (NH4+), Potassium (K+), Calcium (Ca2+), Magnesium (Mg2+)

Avansert prøvetakning for nøyaktige analyseresultat

Vannløselige gasser blir først absorbert i en “Wet Rotating Denuder” enhet, mens vannløselige ioner i aerosoler blir ekstrahert i en “Steam-Jet Aerosol Colector”
 
Gass -og aerosolprøvene blir deretter analysert med en Metrohm ionekromatograf. En flowkontroll- enhet (FCB) sikrer at et presist volum av gass og luft overføres til prøveenhet, hver time.

Analyse av prøver uten tilsyn

To ionekromatografer sørger for en fullautomatisert analyse av oppsamlet gass- og aerosolprøver.

En internkontroll tilsettes under analysen for autokalibrering og konstant sjekk av funksjonaliteten på kolonnen. Den meget innovative programvaren samler all analysedata inkludert valideringsdata, for maksimal sikkerhet i analysen.

Opereres 24/7 uten personal til stede

MARGA er utviklet for fjernbetjening via internettilkobling.

Derfor kontrolleres funksjonaliteten på systemet via fjernbetjening, samt at analyseresultat lastes ned fortløpende. En spesiell power supply (UPS) sikrer operasjon selv ved strømbrudd

Akseptert verden over

MARGA er utviklet av Metrohm Applikon i samarbeid med Energy research Centre i Nederland (ECN) og U.S.EPA.

Teknikken har videre blitt verifisert av U.S. EPA Environmental Technology Verification Program (ETV). Disse blir brukt verden over for innsamling av miljødata fra ulike miljøstudier og prosjekt.

Nedlastning

MARGA excels by its capability of automated data acquisition as well as calculating and storing of results.
Fei Li, researcher at the aerosol ingredient laboratory, Institute of Tropical and Marine Meteorology, Guangzhou