Abstract
A continuous sampling and clean-up device for the determination of PCDD/PCDF in stack gas of incinerators and thermal processes had been described recently [l]. Contamination effects of PCDD/PCDF at the inner surface of the sampling device caused by the adsorption/desorption equilibrium restoration were found to be the major problem for continuous operation of the device because they lead to false emission values after very high or low emission peaks. By adding a definite amount of gaseous methanol to the stack gas in the sampling probe contaminations could be supressed and the extraction capacity of the indicator 2,3,4,7,8-pentafuran drastically increased. Furthermore, the thereby sample matrix obtained represents an optimal solvens for the subsequent continuous clean-up device because recovery rates of the indicator isomer also increased due to prevented adsorption effects. Altogether, the I-TEQ values calculated from the indicator isomer concentration of the modified sampling device are in excellent agreement with those measured by the EN-guideline CEN/TC 264/WG1 (a) [2].
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
