A gas-liquid chromatographic assay of melatonin and indoleamines using heptafluorobutyryl derivatives
✍ Scribed by P.H. Degen; J.R. DoAmaral; J.D. Barchas
- Book ID
- 107711316
- Publisher
- Elsevier Science
- Year
- 1972
- Tongue
- English
- Weight
- 555 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0003-2697
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The gas chromatography of the heptafluorobutyryl derivatives of carbofuran, 3-ketocarbofuran and 3-hydroxycarbofuran is examined with electrolytic conductivity detection (halogen mode). The reaction consists of heating the compounds with heptafluorobutyric anhydride in the presence of trimethylamine
## Abstract A gas‐chromatographic separation of underivatized steroids is described, in which the liquid crystal N,Ń‐bis(p‐phenylbenzylidene)α,α′‐bi‐p‐toluidine (BPhBT) was used isothermally at 265°C for the stationary phase. The nematic range of this crystal is 247 to 403°C. Use of the BPhBT cryst