Abstract
ISO 23753-2:2005 specifies a method for determining soil dehydrogenase activity using 2-(4-iodophenyl)-3-(4-nitrophenyl)-5-phenyltetrazolium chloride (INT). As the INT reduction is less sensitive to O2, the method is more reproducible than the TTC-method described in ISO 23753-1. It is not applicable for determining the dehydrogenase activity in upper layers (L, F, H horizons) of forest humus forms with low microbial activity (e.g. mor), or in soils showing reducing properties (e.g. waterlogged soils).
General information
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Status: WithdrawnPublication date: 2005-11Stage: Withdrawal of International Standard [95.99]
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Edition: 1Number of pages: 5
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Technical Committee :ISO/TC 190/SC 4ICS :13.080.30
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Life cycle
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Now
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Revised by
PublishedISO 23753-2:2019