This part of ISO 14240 specifies a method for the estimation of microbial biomass of soils by measurementof total extractable organic biomass material mainly from freshly killed microorganisms. The method isalso applicable to the estimation of microbial nitrogen and microbial ninhydrin-reactive nitrogen in soil,butThis part of ISO 14240 describes only the measurement of extractable organic carbon. Thefumigation-extraction (FE) method is applicable to aerobic and anaerobic (water-logged, paddy) soils overthe whole range of soil pH. Biomass can be also measured in soils containing actively decomposingsubstrates and soils supersaturated with potassium sulfate solution.
EN ISO 14240-2:2011 Referenced Document
ISO 10381-6:1993 Soil quality; sampling; part 6: guidance on the collection, handling and storage of soil for the assessment of aerobic microbial processes in the laboratory
ISO 11465:1993 Soil quality; determination of dry matter and water content on a mass basis; gravimetric method
EN ISO 14240-2:2011 history
2011EN ISO 14240-2:2011 Soil quality - Determination of soil microbial biomass - Part 2: Fumigation-extraction method (ISO 14240-2:1997)