Retention Time Verification Standard Back Catalog number: 51136 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 38396 CWA BTEX Price on request 71916 1,1-Difluoroethane, 1000µg/ml in MeOH, 1ml Price on request A16560000AL-100 Prothiophos, 100µg/mL in Acetonitrile, 1ml Price on request