<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>G. R. Aiken</dc:creator>
  <dc:date>1984</dc:date>
  <dc:description>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.</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1021/es00130a016</dc:identifier>
  <dc:language>en</dc:language>
  <dc:title>Evaluation of ultrafiltration for determining molecular weight of fulvic acid</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>