EPA Method 507 Nitrogen Phosphorus Pesticide Back Catalog number: 31882 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-1236-S 1,2,3,6-Tetrachlorodibenzofuran, 1.2ml x 50ug/ml, nonane Price on request 0712.11-10MG 1-Methylnaphthalene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 90-12-0 Price on request XA06190100AC Triazine Pesticide Mix 1, 100µg/ml in Acetone, 1ml Price on request