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Resinous materials magnetic resonance

A variety of spectroscopic techniques have been applied to DOC isolated from seawater by cross-flow ultrafiltration or adsorption onto XAD resins. The two techniques isolate very different organic fractions from seawater. Hydrophobic fractions (such as marine humic material) are isolated on XAD resins [48], whereas the organic matter extracted by ultrafiltration is retained primarily on the basis of its molecular size and shape [49], resulting in isolates rich in nitrogen and carbohydrates (polysaccharides). Nuclear magnetic resonance (NMR) spectroscopy has proven successful in distinguishing between the specific structures of XAD-bound humics and the carbohydrates concentrated into colloidal size fractions. [Pg.41]

Nuclear Magnetic Resonance (qv) (86,106) in the liquid state has proven one of the most efficient and valuable tools for analyzing the composition of MF and related resin materials. Besides H NMR (16,107) spectroscopy, whose... [Pg.4443]

See other pages where Resinous materials magnetic resonance is mentioned: [Pg.9]    [Pg.233]    [Pg.285]    [Pg.111]    [Pg.174]    [Pg.50]    [Pg.205]    [Pg.23]    [Pg.42]    [Pg.676]    [Pg.522]    [Pg.408]    [Pg.268]    [Pg.4]    [Pg.64]    [Pg.65]    [Pg.175]    [Pg.153]    [Pg.446]    [Pg.1351]    [Pg.503]    [Pg.16]   
See also in sourсe #XX -- [ Pg.4 , Pg.65 , Pg.73 ]



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