EPA Method 502.2 Internal Standard Back Catalog number: 91703 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended A786992 L-Ascorbic Acid-13C6, 1mg Price on request C17620000 Triadimenol, 250mg Price on request 50825 Conductance @ 20°C [10,000 µmho/cm] Price on request