The Application of Atomic Absorption Spectroscopy and Optical Microscopy to the Characterization of Sized Airborne Particulate in Dayton, Ohio.
Abstract
A four-stage Anderson cascade impactor, fitted onto a standard high volume air sampler was used to collect 24-hour suspended particulate samples at four sites in the Dayton, Ohio, metropolitan area. The particulate was impacted on tared perforated aluminum foil disks and two sheets of Whatman 41 cellulose paper were used as backup filters. The suspended particulate was thus fractionated into five aero-dynamic size ranges, each of which can be related to a specific area of deposition within the human respiratory tract. Some of the particles were removed from the collection media and mounted on slides with Aroclor 5662 for microscopic examination. The foil impaction disks were cut into eight sections each and the particles thereon dry ashed in a low temperature asher for 30 minutes to remove any organic materials. After ashing, each foil section was placed in 10 N nitric acid and the sample removed with a polyethylene scraper. The scraper and foil were rinsed with distilled water, and the total solution was slowly evaporated on a hot plate to approximately 15 milliliters, then diluted in a 25 milliliter volumetric flask with distilled water. One-half of each backup filter was cut into narrow strips, placed in an aluminum foil boat and ashed for 16 hours.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1978
- Accession Number
- ADA105397
Entities
People
- Lorelei Ann Krebs
Organizations
- Air Force Institute of Technology