Abstract
For the routine determination of organic matter inmarine sediment, a rough estimate is often obtained bymeasuring the loss of weight on ignition(Difference-On-Ignition method: D.O.I.). This D.O.I. is to beused in ecological studies where organic material insediment is used as an environmental variable amongothers. A review of papers using this method showed agreat variability within conditions used. Theseconditions are generally used without accuratejustification. We propose a simple standard procedurebased on grain-size fraction of sediment to determineoptimal temperature and time of ignition, and theinfluence of the sample weight. The method proposed, using the loss of weight on ignition, will give thesame accuracy in measurements of organic matter inmarine sediments.
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