Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Laboratory test system to measure microbial respiration rate
Autor van Afferden, M.; Hansen, A.M.; Kaiser, C.; Chapelain, N.;
Journal / Serie International Journal of Environment and Pollution
Erscheinungsjahr 2006
Department UBZ;
Band/Volume 26
Heft 1-3
Sprache englisch;
Abstract This Study reports a sensible, accurate and economic method for continuous measuring microbial respiration. The Measuring principle is ail open system, with a continuous air-flow through. Evolved CO, is absorbed and precipitated as carbonate by a Ba(OH)(2) solution, causing a stoichiometrical decrease in ionic strength of the Solution and in electrical conductivity. Conductivity and Ba(OH)2 concentration correlate over a range of more than three orders of magnitude with a determination coefficient of r(2) = 0.999. Between 20 degrees C and 50 degrees C and Ba(OH)(2) concentrations of up to 0.099M, all automated temperature correction was developed. The system detects evolved CO, quantitatively up to a maximum of 0.22 mmol O-2 min(-1) (825 mbar, 20 degrees C) before limiting microbial respiration. A maximum CO, flow of 1.06 mmol min(-1) is quantitatively absorbed under these conditions. The method was applied to characterise soil respiration of a soil sample from ail agricultural experimental site in Tabasco, Mexico
ID 3085
dauerhafte UFZ-Verlinkung
van Afferden, M., Hansen, A.M., Kaiser, C., Chapelain, N. (2006):
Laboratory test system to measure microbial respiration rate
Int. J. Environ. Pollut. 26 (1-3), 220 - 233