โ Scribed by Andrew P. Tytko; Keith D. Bartle; Norman Taylor; Ifeanyi O. Amaechina; Alan Pomfret
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
A number of procedures have been investigated for the calibration of a size-exclusion chromatography (s.e.c.) column in the determination of molecular mass (MM) distributions of coal derivatives. The behaviour of narrow fractions of coal extracts in the MM range 2003000 was compared with a variety o
coal tar; coal tar therapeutic agents; gas chromatography-mass spectrometry; initiation/promotion mouse skin painting; microbial mutagenicity ; nitrogencontaining polycyclic aromatic compounds; polycyclic aromatic hydrocarbons. In this study, methodologies developed for the analysis of synthetic fu
An alternative method for the analysis of coal-derived materials for oil, asphaltene and preasphaltene content, is described. The test sample is coated as a thin layer on the fine mesh glass beads and the relevant fractions are extracted sequentially with hexane, toluene and pyridine. The efficienci