the combined application of impinger system and permeation tube for the generation of volatile organic compound standard gas mixtures at varying diluent flow rates除尘器的组合应用系统和渗透管对挥发性有机化合物的生成标准气体混合物在不同稀释剂流率.pdf

Sensors 2012, 12, 10964-10979; doi:10.3390/s120810964 OPEN ACCESS sensors ISSN 1424-8220 /journal/sensors Article The Combined Application of Impinger System and Permeation Tube for the Generation of Volatile Organic Compound Standard Gas Mixtures at Varying Diluent Flow Rates Ki-Hyun Kim 1,*, Janice Susaya 1, Jinwoo Cho 1 and David Parker 2 1 Department of Environment Energy, Sejong University, Seoul 143-747, Korea; E-Mails: jsusaya@ (J.S.); jinwoocho@sejong.ac.kr (J.C.) 2 College of Agriculture, Science and Engineering, West Texas AM University, Canyon, TX 79016, USA; E-Mail: dparker@ * Author to whom correspondence should be addressed; E-Mail: khkim@sejong.ac.kr; Tel.: +82-2-3408-3233; Fax: +82-2-3408-4320. Received : 21 May 2012; in revised form: 13 July 2012 / Accepted: 2 August 2012 / Published: 8 August 2012 Abstract: 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