Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71578 2,4-Dinitrophenol-PFB derivative Price on request 71938 Stearic acid butyl ester Price on request 675102 n-Decylbenzene, 100mg Price on request