Calibration Standard Mix 4 Back Catalog number: 53013 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50234 Mix #2 Price on request 71873 Hexafluorobenzene Price on request DFP-LCS-A Mass-Labelled PCDD/PCDF/PCB Solution/Mixture, 1.2ml, nonane Price on request