MA - EPH Matrix Spike Back Catalog number: 92113 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 15900-3750-100AN5 Pendimethalin, 100µg/ml in Acetonitrile, 5ml Price on request N-12148-50MG Heptachlor epoxide (Isomer B), 50mg Price on request 70061 Carbon tetrachloride, 1000µg/ml in MeOH, 1ml Price on request