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Dioxin Data Report
There are 210 congeners for tetra thru octa chlorodibenzo(p)dioxin (75) and chlorodibenzofuran (135), however only the toxic congeners - those with chlorine in the 2,3,7,8- position - are reported. In your report, you will find a concentration for all 2,3,7,8- congeners for dibenzo(p)dioixn (7) and dibenzofuran (10) expressed in units of pg/g (picograms per gram, parts per trillion) or pg/L (picograms per litre, parts per quadrillion) and a detection limit. A total concentation for each homologue series is also calculated and the number of congeners that this total represents is also given. This total includes the contribution from the corresponding 2,3,7,8- congener.
Each toxic congener has been assigned a toxicity equivalent factor (TEF) relevant to 2,3,7,8-TCDD. The individual concentrations multiplied by their corresponding TEF and then summed together give a Toxic Equivalency (TEQ). Both International TEQs and WHO-TEQs are reported.
All samples are spiked with fifteen carbon-13 labelled surrogates prior to extraction. The recovery of these surrogates are monitored and reported.
Finally, all data is checked for accuracy and quality and is authorized by signature.
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