ASTM D-4815 Oxygenates Calibration Set Back Catalog number: 51063 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 18000-2529-100ME5 Guanylurea-HCl, 100µg/ml in MeOH, 5ml Price on request 53070 Spiking Standard #2 Price on request 24002 EPA Method 8240A - Purgeable Surrogate Std Price on request