Turbidity Standard (400 NTU) Back Catalog number: 54122 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended PCB-IS-C20 Mass-Labelled PCB Syringe Spike Solution, 1.2ml, nonane Price on request 92398 3-Furaldehyde Price on request 1697.17-K-IO 9-n-Propylphenanthrene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 17024-03-2 Price on request