EPA Method 200.8 Internal Standard Back Catalog number: 56332 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended SC-474580 Vanillactic Acid, 10mg Price on request 673431 Pyraclostrobin, 100 µg/ml, Acetonitrile, 5ml Price on request XA09010238AL Sulfotep, 100µg/mL in Acetonitrile, 1ml Price on request