Method 1613 Internal Standard Spiking Solution, 200ng/ml in Nonane, 0,5ml Back Catalog number: EDF-5999 Availability: In the manufacturer's stock Price on request - + Recommended 73319 Nonafluorobutane-1-sulfonic acid Price on request XA14955000AL Metconazole, 100μg/mL in Acetonitrile, 1ml Price on request 31004 EPA Method 500 Series Internal Standard Price on request