EPA Method 8315 Calibration Mix #1 Back Catalog number: 83509 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 672953 Doxycycline hyclate, 100mg Price on request 70947 1,2-Diethylbenzene Price on request 56161 Hexavalent Chromium (Cr 6+) Price on request