EPA Method 8260B Internal Standard Back Catalog number: 22213 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 57174 Tungsten (W) Price on request 13800-0280-100IO5 Phthalic acid, di-n/iso-C7-11-alkyl esters, 100µg/ml in Isooctane, 5ml Price on request 18000-0282-100ME5 Clotrimazol, 100µg/ml in MeOH, 5ml Price on request