PropertyValue
nif:beginIndex
  • 0 (xsd:integer)
nif:broaderContext
nif:endIndex
  • 256 (xsd:integer)
nif:isString
  • Each sample was then treated with an acid-base-acid sequence as follows: 2 M HCl at 60°C for 2 hours to remove carbonate and any infiltrated fulvic acid contaminants,0.5–4% NaOH at 60°C for 10 hours to remove infiltrated fulvic and humic acid contaminants.
rdf:type