EPA Method 8240A - Ketones Back Catalog number: 82425 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-1234789-S 1,2,3,4,7,8,9-Heptachlorodibenzofuran, 1.2ml x 50ug/ml, nonane Price on request 79490 Dioxathion Price on request 52082 Instrument Standard 6 Price on request