EPA Method 8315 Calibration Mix #1 Back Catalog number: 83509 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9417.17-100MG Venlafaxine hydrochloride,neat,neat,100mg Price on request 12120.14-K-ME Lidocaine,1000 µg/mL,MeOH,1mL, Price on request 50805 Sulfate (SO42-) Price on request