EPA Method 552,552.1,552.2 Internal Std Back Catalog number: 30105 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71956 2-Methyl-1-pentanol Price on request 71649 N,N-Dimethylacetamide Price on request 2123.12-100-T 2-Hydroxydibenzothiophene, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 22439-65-2 Price on request