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phenyl |
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phenyl (fĕn`əl), C6H5, organic free radical free radical, in chemistry, a molecule or atom that contains an unpaired electron but is neither positively nor negatively charged. Free radicals are usually highly reactive and unstable. ..... Click the link for more information. or alkyl group alkyl group (ăl`kĭl), in chemistry, group of carbon and hydrogen atoms derived from an alkane molecule by removing one hydrogen atom ..... Click the link for more information. derived from benzene benzene (bĕn`zēn, bĕnzēn`), colorless, flammable, toxic liquid with a pleasant aromatic odor. It boils at 80. ..... Click the link for more information. by removing one hydrogen atom. |
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The aliquot of oil was first placed on aminopropyl solid phase extraction (SPE) columns, eluted with hexane, concentrated, and analyzed by GC-ECD equipped with a capillary column coated with a nonpolar stationary phase [5 % (mole fraction) phenyl methylpolysiloxane, DB-5, J & W Scientific, Folsom, CA]. One example of this is PPD, or phenyl propanedione. Fourier transform (FT) Roman spectroscopy can directly measure phenyl groups in pulp lignin, serving as an alternative to the standard permanganate consumption measurement technique and may help to determine residual-lignin concentration in pulps. |
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