Calibration Standard Kit Back Catalog number: 53090 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679556 D5-Nalidixic acid, 10mg Price on request EPA-PAH-LCS Deuterated PAH Solution/Mixture, 1.2ml, toluene Price on request 673828 Pentachlorophenol, 1000mg Price on request