EPA Method 548.1 Analyte Back Catalog number: 30177 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended X9111 Heptachlor Price on request 56112 Magnesium (Mg) Price on request MPN-1 1-Chloro(13C10)naphthalene, 1.2mL x 50ug/mL, nonane Price on request