Retention Time Verification Standard Back Catalog number: 51136 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended EN-1948STK PCDD/PCDF Solution/Mixture, 1.2ml, nonane Price on request 54543 Calcium Hardness Price on request 2209.6-100-ME Tris-(aziridinyl)-phosphineoxide, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 545-55-1 Price on request