I am trying to quantify extractable organic matter in river sediments..
I think, you may do it by molecular marker. Please consult the publication by Brend et al (1991) , 2111-2129 in Atmospheric Environment
http://doi.org/10.1016/0960-1686(91)9008-0
You may also consult the attached files for other methods.
Thank you J. C. Tarafdar.
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