Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 677342 Nonafluoro-1-butanesulfonic acid, 50 µg/ml, Metha Price on request S-12200A1-1ML Imazamethabenz-methyl, 100µg/ml in AL, 1ml Price on request 680097 D4-2-Chlorophenol, 25mg Price on request