||Oxygen Transfer through Flexible Tubing and Its Effects on Ground Water Sampling Results (Journal Version).
Holm, T. R. ;
George, G. K. ;
Barcelona, M. J. ;
||Illinois State Water Survey Div., Champaign.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Ground water ;
Gaseous diffusion process ;
Carbon dioxide ;
Dissolved gases ;
Mathematical models ;
Gas dynamics ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||A model for the diffusion of gases through polymeric tubing was derived which predicts that the amount of gas transferred is proportional to the tubing length and inversely proportional to the pumping rate. The model was experimentally tested and confirmed for oxygen transfer through fluorinated ethylene-propylene copolymer (FEP) tubing using tubing lengths and flow rates typical of ground water sampling. Diffusion can introduce measurable concentrations of oxygen into initially anoxic water. Diffusive loss of carbon dioxide from water that is oversaturated with respect to atmospheric CO2 does not measurably affect pH under similar usage conditions. (Copyright (c) GWMR 1988.)
||Sponsored by Robert S. Kerr Environmental Research Lab., Ada, OK.
||Pub. in Ground Water Monitoring Review, v8 n3 p83-89, 1988.
|NTIS Title Notes
||Not available NTIS