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Sensors 2012, 12(8), 10964-10979; doi:10.3390/s120810964

The Combined Application of Impinger System and Permeation Tube for the Generation of Volatile Organic Compound Standard Gas Mixtures at Varying Diluent Flow Rates

Department of Environment & Energy, Sejong University, Seoul 143-747, Korea
College of Agriculture, Science and Engineering, West Texas A&M University, Canyon, TX 79016, USA
Author to whom correspondence should be addressed.
Received: 21 May 2012 / Revised: 13 July 2012 / Accepted: 2 August 2012 / Published: 8 August 2012
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Commercial standard gas generators are often complex and expensive devices. The objective of this research was to assess the performance of a simplified glass impinger system for standard gas generation from a permeation tube (PT) device. The performance of the impinger standard gas generation system was assessed for four aromatic VOCs (benzene, toluene, ethylbenzene, and m-xylene; BTEX) at varying flow rates (FR) of 50 to 800 mL·min−1. Because actual permeation rate (APR) values deviated from those computed by the manufacturer’s formula (MPR), new empirical relationships were developed to derive the predicted PR (PPR) of the target components. Experimental results corrected by such a formula indicate that the compatibility between the APR and MPR generally increased with low FR, while the reproducibility was generally reduced with decreasing flow rate. Although compatibility between different PRs is at a relatively small and narrow FR range, the use of correction formula is recommendable for the accurate use of PT. View Full-Text
Keywords: impinge; permeation; benzene; toluene; ethylbenzene; xylene impinge; permeation; benzene; toluene; ethylbenzene; xylene

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Kim, K.-H.; Susaya, J.; Cho, J.; Parker, D. The Combined Application of Impinger System and Permeation Tube for the Generation of Volatile Organic Compound Standard Gas Mixtures at Varying Diluent Flow Rates. Sensors 2012, 12, 10964-10979.

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