EPA Method 8240A Calibration Check Compounds Back Catalog number: 82412 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 59138 Conductance @ 20°C [2500 µmho/cm] Price on request 71965 2-Chloro-4-nitrotoluene, 1000µg/ml in MeOH, 1ml Price on request 679240 Salmeterol xinafoate, 10mg Price on request