title: Laboratory-Produced CO(2) Calibration Gases.
abstract: A simple, inexpensive apparatus for making mixtures of accurately known amounts of CO(2) and CO(2)-free atmospheric air is described. Calibration gases with CO(2) contents of 200 to 1500 microliters per liter produced with the apparatus had concentrations which were within 10 microliters per liter of the target concentration.
authors: Department of Agricultural Meteorology, Agricultural Research Organization, The Volcani Center, Bet Dagan 50250, Israel.
authors: H Z
authors: HZ
authors: Enoch