EPA Method 8240A - Purgeable Surr Std Back Catalog number: 20002 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended PN-66S 1,2,3,4,6,7-Hexachloronaphthalene, 50µg/ml in nonane, 1,2ml Price on request 682207 Heptylparaben, 100mg Price on request 11322.10-K-AN Phenacetin,1000 µg/mL,acetonitrile,1mL, Price on request