EPA Method 551.1 Performance Check Soln Back Catalog number: 30104 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended EPA-23ISS Internal Standard Stock Solution, 1.2ml, nonane Price on request 8912.14 4-Methyl-2,2',5,5'-tetrachlorodiphenylmethane, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. Price on request H293862 Hexadecyltrimethylammonium Bromide-d3, 100mg Price on request