Pyrrolidone - a new solvent for the methylation of humic acid
Journal of Research of the U.S. Geological Survey
By: R. L. Wershaw, D. J. Pinckney, and S.E. Booker
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Abstract
In the past, humic acid has been methylated by suspending it in a solution of diazomethane in diethyl ether, and degrading the partly methylated humic acid to release those parts of the molecule that were methylated. Only small fragments of the molecule have been identified by this technique. In the procedure described here the humic acid is dissolved in 2-pyrrolidone and methylated by the addition of diazomethane in diethyl ether and ethanol to the solution. Because the humic acid is completely dissolved in the reaction medium, disaggregation of the humic acid particles takes place and much more complete methylation is obtained. The methylated products may be fractionated by countercurrent distribution and analyzed by mass spectrometry.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Pyrrolidone - a new solvent for the methylation of humic acid |
| Series title | Journal of Research of the U.S. Geological Survey |
| Volume | 3 |
| Issue | 1 |
| Year Published | 1975 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | 4 p. |
| First page | 123 |
| Last page | 126 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |