« Previous AbstractEffects of superheated steam processing on the physicochemical properties of sea rice bran    Next AbstractOccurrence of 13 volatile organic compounds in foods from the Canadian total diet study »

Air Waste

Title:		An exposure system for the calibration of passive samplers to volatile organic compounds at low (ppbv) concentrations
Author(s):		Cao XL; Hewitt CN;
Address:		"Institute of Environmental & Biological Sciences, Lancaster University, Lancaster, United Kingdom"
Journal Title:		Air Waste
Year:		1994
Volume:		44
Issue:		11
Page Number:		1299 - 1302
DOI:		10.1080/10473289.1994.10467324
ISSN/ISBN:		1073-161X (Print) 1073-161X (Linking)
Abstract:		"A recycling exposure system, which has characteristics of dynamic and static systems, has been designed and constructed for calibrating passive sampling tubes. This system is very easy to set up and maintain. Organic vapors inside the system are generated by syringe injection, and homogeneous vapors are circulated by a metal-bellows pump. The concentrations of light hydrocarbons (e.g., isoprene) may decrease slightly after circulating for longer than 10 hours; however, this system is very stable for C5-C8 hydrocarbons for at least eight hours. The system has been used successfully to calibrate Perkin-Elmer diffusion tubes packed with Chromosorb 106 for collecting benzene vapor at low exposure doses (< 70 ppmv x min). The entire system can be easily and effectively cleaned by circulating through a U-tube packed with activated carbon"
Keywords:		Air Pollutants/*analysis Calibration Environmental Monitoring/*methods/standards Equipment Design Hydrocarbons/*analysis Volatilization;
Notes:		"MedlineCao, X L Hewitt, C N eng Research Support, Non-U.S. Gov't 1994/11/01 Air Waste. 1994 Nov; 44(11):1299-302. doi: 10.1080/10473289.1994.10467324"