The real issue with wall deposits in closed filter cassettes--what's the sample?
The measurement of aerosol dusts has long been utilized to assess the exposure of workers to metals. Tools used to sample and measure aerosol dusts have gone through many transitions over the past century. In particular, there have been several different techniques used to sample for beryllium, not...
| Publicado en: | Journal of Occupational & Environmental Hygiene Vol. 6; no. 12; pp. 783 - 789 |
|---|---|
| Autores principales: | , |
| Formato: | Journal Article |
| Publicado: |
Taylor & Francis Ltd
Dec2009
|
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=105239632&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 105239632 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 15459624 V1L jtl: Journal of Occupational & Environmental Hygiene issn: 15459624 maglogo: Y pubinfo: dt: Dec2009 vid: 6 iid: 12 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 105239632 105239632 2010464571 10.1080/15459620903261427 NLM19894181 105239632 ppf: 783 ppct: 6 formats: fmt: @attributes: type: P tig: atl: The real issue with wall deposits in closed filter cassettes--what's the sample? aug: au: Brisson MJ Archuleta MM affil: Savannah River Nuclear Solutions LLC, Aiken, South Carolina 29808, USA. mike.brisson@srs.gov sug: subj: Air Pollutants Analysis Air Pollution Evaluation Dust Analysis Occupational Exposure Evaluation Particulate Matter Analysis Aerosols Analysis Air Pollution Standards Education, Continuing (Credit) Environmental Monitoring Methods Environmental Monitoring Standards ab: The measurement of aerosol dusts has long been utilized to assess the exposure of workers to metals. Tools used to sample and measure aerosol dusts have gone through many transitions over the past century. In particular, there have been several different techniques used to sample for beryllium, not all of which might be expected to produce the same result. Today, beryllium samples are generally collected using filters housed in holders of several different designs, some of which are expected to produce a sample that mimics the human capacity for dust inhalation. The presence of dust on the interior walls of cassettes used to hold filters during metals sampling has been discussed in the literature for a number of metals, including beryllium, with widely varying data. It appears that even in the best designs, particulates can enter the sampling cassette and deposit on the interior walls rather than on the sampling medium. The causes are not well understood but are believed to include particle bounce, electrostatic forces, particle size, particle density, and airflow turbulence. Historically, the filter catch has been considered to be the sample, but the presence of wall deposits, and the potential that the filter catch is not representative of the exposure to the worker, puts that historical position into question. This leads to a fundamental question: What is the sample? This article reviews the background behind the issue, poses the above-mentioned question, and discusses options and a possible path forward for addressing that question. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|