Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675254 1,3,5-Trinitrobenzene, 100 µg/ml, Acetonitrile, Price on request 57204 Beryllium (Be) Price on request 1076.15-K-IO n-Nonylbenzene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 1081-77-2 Price on request