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Alek Zander ;Revista Brasileira de Ciência do Solo 2012, 36 2

Author: Gregory Doran

Source: http://www.redalyc.org/


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Revista Brasileira de Ciência do Solo ISSN: 0100-0683 revista@sbcs.org.br Sociedade Brasileira de Ciência do Solo Brasil Doran, Gregory; Zander, Alek An improved method for measuring soil microbial activity by gas phase flow injection analysis Revista Brasileira de Ciência do Solo, vol.
36, núm.
2, marzo-abril, 2012, pp.
349-357 Sociedade Brasileira de Ciência do Solo Viçosa, Brasil Available in: http:--www.redalyc.org-articulo.oa?id=180222641004 How to cite Complete issue More information about this article Journals homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative An Improved Method for Measuring Soil Microbial Activity by Gas Phase. 349 An Improved Method for Measuring Soil Microbial Activity by Gas Phase Flow Injection Analysis(1) Gregory Doran(2) & Alek Zander(2) Abstract The rate of carbon dioxide production is commonly used as a measure of microbial activity in the soil.
The traditional method of CO2 determination involves trapping CO 2 in an alkali solution and then determining CO 2 concentration indirectly by titration of the remaining alkali in the solution. This method is still commonly employed in laboratories throughout the world due to its relative simplicity and the fact that it does not require expensive, specific equipment.
However, there are several drawbacks: the method is timeconsuming, requires large amounts of chemicals and the consistency of results depends on the operator’s skills.
With this in mind, an improved method was developed to analyze CO2 captured in alkali traps, which is cheap and relatively simple, with a substantially shorter sample handling time and reproducibility equivalent to the traditional titration method.
A comparison of the concentration values determined by gas phase flow injection analysis (GPFIA) and titration showed no significant differen...





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