Method for measurement of Particulate matter, SO2 & NO2 Method for measurement of Particulate Matter (PM10) in ambient air is done by Cyclonic Flow Technique. Particles with aerodynamic diameter less than the cut-point of the inlet are collected by a filter. Ambient air at the monitoring location is sucked through a cyclone. Coarse and non-reparable dust is separated from the air stream by centrifugal forces acting on the solid particles and these particles fall through the cyclone's conical hopper and get collected in the sampling cap placed at the bottom. The fine dust (<10 microns) forming the particulate matter (PM10) passes the cyclone and is retained on the filter paper The mass of these particles is determined by the difference in filter weights prior to and after sampling. The concentration of PM10 in the designated size range is calculated by dividing the weight gain of the filter by the volume of air sampled. A tapping is provided on the suction side of the blower to provide suction for sampling air through a set of impingers for containing absorbing solutions for SO2 and NO2. Samples of gases are drawn at a flow rate of 0.2 liters per minute. The APM MFC 550 is used for PM2.5. This system is a manual method for sampling fine particles (PM2.5 fraction) and is based on Impactor designs standardized by USEPA for ambient air quality monitoring. PM2.5& PM10 have been estimated by gravimetric method. Improved West and Gaeke method (IS-5182 part-II, 1969) has been adopted for estimation of SO2 and Modified method (IS-5182 part-VI, 1975) has been adopted for the estimation of NO2. Method for measurement of Carbon Monoxide NDIR method – Instrument used: Ecotech Serinus 30 Carbon Monoxide This analyzer is used to measure CO in ambient air, in the of 0-200 ppm (220 mg/m3) to a sensitivity of 0.05 ppm 55µg/m3). The Serinus 30 combines the benefits of Micro process control with Non-Dispersive Infrared Spectrophotometry technology.CO Concentration is automatically corrected for gas temperature and pressure changes. Ambient Air Quality Monitoring (15.1.2014)
Method for measurement of Particulate matter, SO2 & NO2 Method for measurement of Particulate Matter (PM10) in ambient air is done by Cyclonic Flow Technique. Particles with aerodynamic diameter less than the cut-point of the inlet are collected by a filter. Ambient air at the monitoring location is sucked through a cyclone. Coarse and non-reparable dust is separated from the air stream by centrifugal forces acting on the solid particles and these particles fall through the cyclone's conical hopper and get collected in the sampling cap placed at the bottom. The fine dust (<10 microns) forming the particulate matter (PM10) passes the cyclone and is retained on the filter paper The mass of these particles is determined by the difference in filter weights prior to and after sampling. The concentration of PM10 in the designated size range is calculated by dividing the weight gain of the filter by the volume of air sampled. A tapping is provided on the suction side of the blower to provide suction for sampling air through a set of impingers for containing absorbing solutions for SO2 and NO2. Samples of gases are drawn at a flow rate of 0.2 liters per minute. The APM MFC 550 is used for PM2.5. This system is a manual method for sampling fine particles (PM2.5 fraction) and is based on Impactor designs standardized by USEPA for ambient air quality monitoring. PM2.5& PM10 have been estimated by gravimetric method. Improved West and Gaeke method (IS-5182 part-II, 1969) has been adopted for estimation of SO2 and Modified method (IS-5182 part-VI, 1975) has been adopted for the estimation of NO2. Method for measurement of Carbon Monoxide – NDIR method Instrument used: Ecotech Serinus 30 Carbon Monoxide This analyzer is used to measure CO in ambient air, in the of 0-200 ppm (220 mg/m3) to a sensitivity of 0.05 ppm 55µg/m3). The Serinus 30 combines the benefits of Micro process control with Non-Dispersive Infrared Spectrophotometry technology.CO Concentration is automatically corrected for gas temperature and pressure changes. Ambient Air Quality Monitoring (15.1.2014)
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