EPA Method 500 Series Internal Standard Back Catalog number: 31004 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50151 Phenylarsine oxide Standard Price on request PN-6S 1,5-Dichloronaphthalene, 1.2ml x 50ug/ml, nonane Price on request S-4059-0.5-BX5 Thiophene in Thiophene-free Benzene Units: 5x1mL ampoule, 10mL screw-capped bottle Chiron No. Concentration Light White Mineral Oil µg thiophene/g (20 cSt at 40°C) Price on request