EPA Method 551.1 Internal Standard Back Catalog number: 32103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 681840 Pirimicarb-desamido-desmethyl, 10.0 µg/ml, Aceton Price on request 59362 Total Dissolved Solids Price on request 1750.15-100-IO 2,4,6-Trimethyldibenzothiophene, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 185493-79-7 Price on request