GFAA Initial Calibration Verification Back Catalog number: 53315 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70302 Triphenyl phosphate Price on request DF-SS-A100 Mass-Labelled PCDD Sampling Spike Solution, 1.2ml x 100ng/ml, nonane Price on request 72285 L-Valine Price on request