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Humic acid samples solvent fractionation

Selective extraction was used to operationally determine the quantitative and qualitative distributions of PCB 8 and saturated hydrocarbons among free lipid (FL), humic acid (HA), and humin (HU) fractions of four contaminated estuarine sediments. In all samples, over 90% of the total sedimentary PCB s and hydrocarbons were extracted with FL fractions. Bound (HA and HD) and free assemblages of these compounds may have derived from different sources. Two polar, chlorinated pollutants also detected In this study, hexachlorophene (HCP) and pentachlorophenol (PCP), were proportionately more concentrated In bound fractions than the non-polar compounds HCP was detected only In HA fractions and was probably chemically hound to refractory organic matter. Selective extraction Is a promising technique for Investigating strongly bound polar pollutants, such as HCP, which apparently are not recovered by conventional solvent extraction. [Pg.198]

See other pages where Humic acid samples solvent fractionation is mentioned: [Pg.431]    [Pg.613]    [Pg.187]    [Pg.191]    [Pg.466]    [Pg.818]    [Pg.413]    [Pg.110]    [Pg.1229]    [Pg.216]    [Pg.199]    [Pg.946]    [Pg.60]    [Pg.421]    [Pg.186]    [Pg.190]    [Pg.264]    [Pg.443]   
See also in sourсe #XX -- [ Pg.188 ]



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Acids solvents

Fractionation solvent

Humic acid , acidity

Humic acid samples

Humic acids

Humic fractionation

Humic fractions

Sample Fractionation

Sample solvent

Solvents acidic

Solvents acidity

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