Evaluation of ultrafiltration for determining molecular weight of fulvic acid
January 1, 1984
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.
Citation Information
| Publication Year | 1984 |
|---|---|
| Title | Evaluation of ultrafiltration for determining molecular weight of fulvic acid |
| DOI | 10.1021/es00130a016 |
| Authors | G. R. Aiken |
| Publication Type | Article |
| Publication Subtype | Journal Article |
| Series Title | Environmental Science & Technology |
| Index ID | 70013808 |
| Record Source | USGS Publications Warehouse |