Limitations of XAD resins for isolation of the non-colloidal humic fraction in soil extracts and aquatic samples

✍ Scribed by Raewyn M. Town; H.Kipton J. Powell

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 651 KB
• Volume: 271
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)80045-m

✦ Synopsis

XAD resms are widely used to Isolate aquatlc humlc substances In this work the molecular adsorptlon and subsequent desorptlon of a sod humlc acid on XAD-2, 4, -7 and -8 was studled Gel permeation chromatography estabhshed that size-exclusion effects were operative, large humlc molecules (MW > 30000) were not slgmficantly adsorbed by these XAD resins These results hlghhght the operatlonal defimtlon of humlc substances Isolated vka XAD resins