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Evaluation of ultrafiltration for determining molecular weight of fulvic acid

Environmental Science and Technology

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DOI: 10.1021/es00130a016

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Abstract

Two commonly used ultrafiltration membranes are evaluated for the determination of molecular weights of humic substances. Polyacrylic acids of Mr 2000 and 5000 and two well-characterized fulvic acids are used as standards. Molecular size characteristics of standards, as determined by small-angle X-ray scattering, are presented. Great care in evaluating molecular weight data obtained by ultrafiltration is needed because of broad nominal cutoffs and membrane-solute interactions.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Evaluation of ultrafiltration for determining molecular weight of fulvic acid
Series title:
Environmental Science and Technology
DOI:
10.1021/es00130a016
Volume
18
Issue:
12
Year Published:
1984
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Environmental Science and Technology
First page:
978
Last page:
981
Number of Pages:
4