Internal Standard for AB SIM Back Catalog number: 94516 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11768.12-100-IO 2,3,3',4,5,5',6-Heptachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request 92997 Semi-Volatile Standard Price on request 56138 Strontium (Sr) Price on request