We are preparing to conduct a project on organic pollutants in city area especially, roadside at heavy traffic and gas stations. It is important to use appropriate sampler apparatus to collect sample before carrying out sample preparation in lab for further analysis. Please share your experiences.
A little much broad question. You should be more specific about the analytical methods you are planning to use.
But ok - here is my basic experience. Easiest way, we used when determining dust emissions in vicinity of a coal mine, was simple pumping of air through the glass fibre filter with porosity 0.4 um. To obtain weighable mass of material on the filter (diameter 45 mm), several days (at least 3) of exposure were needed. The weight of sample caught after 7 days of exposure correlated positively with mean PM10 averages measured by automatic stations.
Analytical determination of heavy metals on these filters was problematic due to problems with borosilicate glass decomposition. So we tested nitrocellulose filters but these had problems with accumulation of material when the dustiness levels were high. PP and teflon filters were tested but the adhesion of dust particles to these materials was unsatisfatory.
These are my thoughts...
Dear Hajisamoh,
very briefly: today, active and passive samplers are available and routinely used.
It is up to you (and your budget) what type of samplers you deploy. Active samplers are quite costly and require power supply. If you have them (and electrical power supply is not a limitation), use them.
The passive ones, on the other hand, are quite simple and inexpensive. Moreover, no power supply is neccessary. A lot of data are avalible in the literature for both types of sampling appoach as well as for their comparison.
hope it helps a bit,
Tomas
Gas collecting instruments easily available in market. depend upon requirement it may be selected. organic/Inorganic suspended particulates materials easily collected in prescribed resin papers of micro sizes. Instruction manual and procesure available for observation and results with the instrument.
Thank so much for providing valuable information and recommendation.
Naser
A review on the principles of passive air sampler (PAS) techniques and progress of the polyurethane foam-based PAS (PUF-PAS) in monitoring persistent organic pollutants (POPs); may be useful for your study.
Polyurethane Foam-Based Passive Air Samplers in Monitoring Persistent Organic Pollutants: Theory and Application
https://www.researchgate.net/publication/320111872_Polyurethane_Foam-Based_Passive_Air_Samplers_in_Monitoring_Persistent_Organic_Pollutants_Theory_and_Application
Regards
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