DETERMINATIONS OF HEXABROMOCYCLODODECANE (HBCD) ISOMERS IN PLASTIC PRODUCTS FROM CHINA BY LC-MS/MS

摘要

HBCD is widely used brominated flame retardant, which is increasingly reported in the environment. In the study, the determinations of three HBCD isomers, α-, β-, and γ-HBCD in plastic products by LC-MS/MS method using respective labeled compounds as internal standard were developed. Plastic products included polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), and acrylonitrile butadiene styrene (ABS). Soxhlet extraction with n-hexane-isopropanol (1:1, v/v) was used, and extraction efficiency was confirmed to be satisfying by analyzing bromine by using XRF before and after extraction. Moreover, LC and MS/MS conditions were optimized. The limits of quantitation of 0.01, 0.005, and 0.005 mg kg−1 were calculated for three HBCD isomers, respectively. Using the established methods, HBCD emerged in two PS products of 15 commercially available plastic products in China. A higher proportion of α-HBCD in two PS products was compared with that of commercial HBCD mixtures, indicating that γ-HBCD possibly isomerized to α-HBCD by heating processes to incorporate the commercial formulation into plastic products.View full textDownload full textKeywordsdetermination, extraction efficiency, HBCD, internal standard, LC-MS/MS, plastics productsRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/10826076.2011.604111