Retention Time Marker Solution Iowa OA-2 Back Catalog number: 51183 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673781 DEET, 100 µg/ml, Ethyl acetate, 5ml Price on request 676228 Parathion-methyl, 100 µg/ml, Toluene, 1ml Price on request 59732 Metals Mix #1 Price on request