Multicomponent Stock Solution of PCBs 7 components (ISO 10382:2002)100mg/l each of PCB 28 [CAS:7012-37-5] ; PCB 52 [CAS:35693-99-3] ; PCB 101 [CAS:37680-73-2] ; PCB 118 [CAS:31508-00-6] ; PCB 138 [CAS:35065-28-2] ; PCB 153 [CAS:35065-27-1] ; PCB 180 [CAS:35065-29-3] in Iso-octane