WORKPLACE MONITORING OF PBDFS AND PBDDS DURING EXTRUSION PRODUCTION AND INJECTION-MOLDING OF A POLYBUTYLENETEREPHTHALATE (PBTP) GLASS-FIBERTETRABROMO-BISPHENOL A CARBONATE OLIGOMER (BC52-ASTERISK) SB2O3-RESIN.2./

Workplace air measurements are presented for PBDDs and PBDFs. These me asurements were taken during extruder production and injection molding of a PBTP-polymer blended with glass fiber, Sb2O3, and tetrabromobisp henol A carbonate oligomer powder or PBTP-BC52-batch. The extruder gra nulate and the molded test articles were also analyzed. The sampling t rains, technique and plans, as well as the preparation, clean up and d etermination methods were further developed on the basis of our previo us work in this field1,5. No 2,3,7,8-isomer-substituted PBDDs and PBDF s could be detected. The values monitored for the other isomers (tetra - to hexabromo-compounds) were in the region of 30 to 260 pg/m3.