QC Standard 4 Back Catalog number: 53087 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended YA10330100AL Atrazine D5 (ethylamino D5), 1000 µg/mL in Acetonitrile, 1ml Price on request 1240.7-K-ME n-Heptane, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 142-82-5 Price on request ACQ-WH03-030 Ethanol standard in whole blood,0.3g/L,whole blood, 3mL Price on request