525.2 Calibration Standard Back Catalog number: 94894 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72408 Butyric acid Price on request 8:8PFPI Sodium bis(perfluorooctyl)phosphinate, 50µg/ml in MeOH, 1,2ml Price on request 71346 4-Ethylheptane Price on request