Spike Sample Standard 1 Back Catalog number: 53028 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 93984 WS Disinfection By-Products - Cal Check 2 Price on request 70474 1,1,2-Trichlorotrifluoroethane Price on request DF-LCS-A200 Mass-Labelled PCDD/PCDF Solution/Mixture , 1.2ml , nonane Price on request