A. Sjödin, E. Jakobsson, A. Kierkegaard
Sep 25, 1998
Citations
14
Influential Citations
233
Citations
Quality indicators
Journal
Journal of Chromatography A
Abstract
Abstract Thirty-one brominated diphenyl ether (BDE) standards have been used for identification and quantification of unknown congeners in the technical flame-retardant, Bromkal 70-5DE, using relative retention versus dechlorane and standard additions on four different high-resolution gas chromatography capillary columns with low-polar to very polar properties. Nine new BDE congeners were identified. Eight of these were also quantified as mass percent of the product: 2,2′,4,4′,6-pentaBDE (6.8%), 2,2′,4,4′,5,5′-hexaBDE (3.9%), 2,2′,4,4′,5,6′-hexaBDE (2.5%), 2,2′,3,4,4′-pentaBDE (1.6%), 2,2′,3,4,4′,5′-hexaBDE (0.41%), 2,3′,4,4′-tetraBDE (0.22%), 2,4,4′-triBDE (0.11%) and 2,2′,4-triBDE (0.22%). The ninth congener was 2,2′,3,4,4′,5′,6-heptaBDE. The two previously identified BDE congeners in Bromkal 70-5DE, 2,2′,4,4′-tetraBDE and 2,2′,4,4′,5-pentaBDE constituted 35% and 37%, respectively, in this batch.