EPA Method 8260B Internal Standard Back Catalog number: 22213 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2589.32 Dinaphtho[2,1,8,7-defg;2',1',8',7'-ijkl]pentaphene, Please inquire, Solvent-, Unit , # of units-, Cas.no. 188-90-9 Price on request 59523 AAS Standard Price on request 675256 Atenolol, 100 µg/ml, Acetonitrile, 5ml Price on request