EPA Method 548 Analyte Back Catalog number: 30048 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 674528 Benzyldimethylhexadecylammonium chloride, 10.0 µg/ Price on request 70948 1,3-Diethylbenzene Price on request 56125 Manganese (Mn) Price on request