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Factors Affecting Measurements of Oxygen Diffusion Rate (ODR) with Bare Platinum Microelectrodes 1
Author(s) -
Kristensen K. J.
Publication year - 1966
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1966.00021962005800030032x
Subject(s) - platinum , microelectrode , ohm , oxygen , diffusion , soil water , electrical resistivity and conductivity , electrode , chemistry , electrical resistance and conductance , volumetric flow rate , analytical chemistry (journal) , materials science , environmental science , soil science , environmental chemistry , thermodynamics , electrical engineering , composite material , physics , catalysis , biochemistry , organic chemistry , engineering
The electrical resistance in the soil between the platinum electrode and the reference cell is very high in normal soils. Depending on the salt and water content, values from 5,000 to 20,000 ohms are commonly found. Drainage of the soil tends to increase the resistance, while the potential oxygen diffusion increases. However, the actual oxygen reduction will partly depend on the electrical resistance according to Ohm's law. This is discussed in the present paper and a method is suggested by which the current flow (ODR) can be corrected.