EPA Method 8021B Internal Standard Back Catalog number: 19394 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 95341 Semi-Volatile Mix Price on request 12120.14-100-ME Lidocaine,100 µg/mL,MeOH,1mL, Price on request 96642 PAH Mix, 1000µg/ml in methylene chloride, 1ml Price on request