Short Duration Needle Trap Sampling with Gas Chromatography Analysis to Determine Nearly Instantaneous Concentrations of Selected Organic Vapor Contaminants.
Needle trap device samplers were used for rapid (60 s) quantitative sampling of short-term exposure limit (STEL) and peak exposure standard concentrations using a manually operated pump to collect small volume (10 mL) gas phase samples containing methylene chloride, benzene, toluene, and tetrachloro...
| Publicado en: | Journal of Occupational & Environmental Hygiene Vol. 10; no. 12; pp. 674 - 685 |
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| Autores principales: | , , , , |
| Formato: | equations & formulas research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Dec2013
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| 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=104154383&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104154383 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 15459624 V1L jtl: Journal of Occupational & Environmental Hygiene issn: 15459624 maglogo: Y pubinfo: dt: Dec2013 vid: 10 iid: 12 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 104154383 91858730 10.1080/15459624.2013.831982 NLM24195534 104154383 ppf: 674 ppct: 11 formats: fmt: @attributes: type: P tig: atl: Short Duration Needle Trap Sampling with Gas Chromatography Analysis to Determine Nearly Instantaneous Concentrations of Selected Organic Vapor Contaminants. aug: au: Strating, Simon J. Juarez, Theodore J. Stevens, Michael E. White, Duvel W. Smith, Philip A. affil: Department of Preventive Medicine and Biometrics, Uniformed Services University of the Health Sciences, Bethesda, Maryland sug: subj: Chromatography, Gas Utilization Equipment Design Occupational Exposure Evaluation Organic Chemicals Classification Volatilization Human Maryland Quantitative Studies Solid Phase Extraction Calibration Funding Source ab: Needle trap device samplers were used for rapid (60 s) quantitative sampling of short-term exposure limit (STEL) and peak exposure standard concentrations using a manually operated pump to collect small volume (10 mL) gas phase samples containing methylene chloride, benzene, toluene, and tetrachloroethylene vapors. Solventless introduction of chemical samples for gas chromatography analysis with flame ionization detection yielded linear results (R2> 0.99) for vapor standard mixtures of the four target analytes ranging from 10% to 200% of their respective nominal STEL or peak exposure standard concentrations. Needle trap samplers showed ≥86% recovery (as GC-FID peak area responses) following 14-day storage at room temperature compared to the same samplers analyzed immediately, with better recovery values observed with shorter storage (≥95% at room temperature for seven days, except for methylene chloride) or with storage at 4°C. Calibration for quantitation of concentrations of benzene, toluene, and tetrachloroethylene was shown to be possible with the use of an internal standard to account for injector discrimination between the solventless NTD approach and injections of target analytes in carbon disulfide. Due to the simple sampling method (no field calibration and battery-free pumping) and the avoidance of solvent dilution, a needle trap sampling approach could simplify sample collection and analysis to chromatographically determine nearly instantaneous (1 min) exposure concentrations. pubtype: Academic Journal doctype: equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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