Retention Time Marker Standard Back Catalog number: 93609 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679988 Pseudotropine, 10mg Price on request 79028 Benzo(b)fluoranthene, 1000µg/ml in Acetonitrile, 1ml Price on request 71990 4-Methyl-1-pentene Price on request