EPA Method 624 Internal / Surrogate Standard Back Catalog number: 92559 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9270.29-K-ME (2R)-?-Tocopherol-d6 (5,7-di(methyl-d3)),1000 µg/mL,MeOH,1mL Price on request 680120 Isopropylbenzene, 500mg Price on request 13768.9-K-ME Lamotrigine-13C3,d3, Major, 1000µg/ml in MeOH, 1ml Price on request