Clients undertake sampling for Polychlorinated Dibenzodioxins and Dibenzofurans (Dioxins and Furans) in accordance with BSEN 1948/USEPA 23 using an isokinetic sampling train.
Prior to sampling, MLS will pass the following components of the train – A resin trap filled with XAD-2 which has been pre-cleaned and spiked with the required C-13 standards; a filter and an empty container for washings. At the end of the sampling all components are placed in the box and returned to MSS (UK) for analysis.
In the Millbrook laboratory at MSS, analysis is performed to using solvent extraction followed by chromatographic clean-up and High Resolution GCMS using the latest Micromass Ultima Autospec instrumentation. Samples are analysed for the 17 target dioxin/furan congeners to enable calculation of the I-TEQ value with results reported as total and I-TEQ. In order to compare measured data with limit values the results in ng/sample require to be divided by the air sample volume in m3 and then corrected to the appropriate reference conditions.