EPA Method 502.2 Internal Standard Back Catalog number: 91703 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 676764 Iodosulfuron-methyl sodium, 100 µg/ml, Acetonitri Price on request 676612 Mepiquat chloride, 100 µg/ml, Water, 1ml Price on request MDF-2 2-Chloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene Price on request