{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/43928"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/43928","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Comparative particulate sampling methods","abstract":"At present, there are several methods of determining the mass concentration of suspended particulate matter in ambient air. Most of these methods, including the EPA reference method, require manual filtering and weighing of the collected sample. This is both costly and time-consuming and is subject to a considerable amount of human error. Another serious drawback to most of these procedures is the long (24 hour) sampling times required, and the resultant insensitivity to fluctuations due to the long averaging intervals. The piezoelectric microbalance and high volume sampler techniques were employed in this investigation to measure the mass of ambient undifferentiated particulate matter. The results were compared and conclusions drawn concerning the feasibility of using the piezoelectric microbalance along with or in place of the high volume sampler for measurement of ambient particulate matter. It was found that the piezoelectric microbalance can be used in place of or along with the high volume sampler but consideration must be given to the fact that the piezoelectric microbalance will give lower average particulate concentration readings depending on the particle size distribution of the ambient particulate matter being sampled.","abstract_html":"At present, there are several methods of determining the mass concentration of suspended particulate matter in ambient air. Most of these methods, including the EPA reference method, require manual filtering and weighing of the collected sample. This is both costly and time-consuming and is subject to a considerable amount of human error. Another serious drawback to most of these procedures is the long (24 hour) sampling times required, and the resultant insensitivity to fluctuations due to the long averaging intervals. The piezoelectric microbalance and high volume sampler techniques were employed in this investigation to measure the mass of ambient undifferentiated particulate matter. The results were compared and conclusions drawn concerning the feasibility of using the piezoelectric microbalance along with or in place of the high volume sampler for measurement of ambient particulate matter. It was found that the piezoelectric microbalance can be used in place of or along with the high volume sampler but consideration must be given to the fact that the piezoelectric microbalance will give lower average particulate concentration readings depending on the particle size distribution of the ambient particulate matter being sampled.","abstract_has_math":false,"creators":["Twitty, Frank Butler"],"institution":"Virginia Tech","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Environmental Sciences and Engineering","degree_department":"Environmental Sciences and Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1974,"date_issued":"1974","date_published":"1974","updated_at":"2026-07-22T22:19:47Z","subjects":[],"languages":[],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-07282010-020043"],"render_values":[{"text":"etd-07282010-020043","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10919/43928","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Environmental Sciences and Engineering"]},{"key":"dc:creator","label":"Author","values":["Twitty, Frank Butler"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2014-03-14T21:41:20Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2014-03-14T21:41:20Z","2010-07-28"]},{"key":"dc:date.issued","label":"Date","values":["1974"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Tech"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Environmental Sciences and Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["etd-07282010-020043"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/43928"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["At present, there are several methods of determining the mass concentration of suspended particulate matter in ambient air. Most of these methods, including the EPA reference method, require manual filtering and weighing of the collected sample. This is both costly and time-consuming and is subject to a considerable amount of human error. Another serious drawback to most of these procedures is the long (24 hour) sampling times required, and the resultant insensitivity to fluctuations due to the long averaging intervals. The piezoelectric microbalance and high volume sampler techniques were employed in this investigation to measure the mass of ambient undifferentiated particulate matter. The results were compared and conclusions drawn concerning the feasibility of using the piezoelectric microbalance along with or in place of the high volume sampler for measurement of ambient particulate matter. It was found that the piezoelectric microbalance can be used in place of or along with the high volume sampler but consideration must be given to the fact that the piezoelectric microbalance will give lower average particulate concentration readings depending on the particle size distribution of the ambient particulate matter being sampled."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["BTD"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Comparative particulate sampling methods"]}]}],"canonical_facts":{"dc:contributor.department":["Environmental Sciences and Engineering"],"dc:creator":["Twitty, Frank Butler"],"dc:date.accessioned":["2014-03-14T21:41:20Z"],"dc:date.available":["2014-03-14T21:41:20Z","2010-07-28"],"dc:date.issued":["1974"],"dc:description.abstract":["At present, there are several methods of determining the mass concentration of suspended particulate matter in ambient air. 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