Evaluation of ultrafiltration for determining molecular weight of fulvic acid
Environmental Science & Technology
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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.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Evaluation of ultrafiltration for determining molecular weight of fulvic acid |
| Series title | Environmental Science & Technology |
| DOI | 10.1021/es00130a016 |
| Volume | 18 |
| Issue | 12 |
| Publication Date | May 01, 2002 |
| 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 |