TPH Internal Standard Back Catalog number: 92636 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676549 D4-Prochloraz, 100 µg/ml, Acetonitrile, 1ml Price on request 677796 2,3,6-Trichlorobenzoic acid, 100 µg/ml, Acetonitr Price on request 70469 Dinoseb methyl ether Price on request