600. The effect of solvent on the ultra-violet absorption spectra of aromatic hydrocarbons with special reference to the mechanism of salting-out. Part I. Alcoholic lithium chloride solutions

1952 ◽  
pp. 3137 ◽  
Author(s):  
E. F. G. Herington ◽  
W. Kynaston
Keyword(s):  
Special Reference ◽  
Absorption Spectra ◽  
Lithium Chloride ◽  
Aromatic Hydrocarbons ◽  
Ultra Violet ◽  
Salting Out ◽  
Chloride Solutions ◽  
Effect Of Solvent

scholarly journals The ultra-violet absorption spectra of some complex aromatic hydrocarbons—II

1937 ◽  
Vol 158 (895) ◽  
pp. 634-650 ◽  
Keyword(s):  
Absorption Spectra ◽  
Aromatic Hydrocarbons ◽  
Low Temperatures ◽  
Ultra Violet ◽  
Induction Coil ◽  
Experimental Investigations ◽  
Quantitative Measurements ◽  
Biological Importance

The results of the study of the absorption spectra of a number of complex aromatic hydrocarbons, some of which are of considerable biological importance, were described in a previous paper (Part I).* The present paper contains results of similar experimental investigations, together with an account of quantitative measurements at low temperatures. For general theoretical relationships, nomenclature, and technique at room temperatures, reference should be made to Part I, the results here described being obtained as before with a “ Spekker ” photometer. The only experimental change is the substitution of a transformer for the induction coil outfit previously employed. Purity of Materials With few exceptions, all of the compounds studied were prepared synthetically in this Institute by methods described in the original memoirs to which reference is made. The specimens employed for spectroscopic purposes were the original highly purified analytical samples or else specimens which had been specially prepared and purified for examination.

Multi-alkylated Polynuclear Aromatic Hydrocarbons of Tobacco Smoke: Separation and Identification

1978 ◽  
Vol 9 (4) ◽  
Author(s):  
M. E. Snook ◽  
R. F. Severson ◽  
R. F. Arrendale ◽  
H. C. Higman ◽  
O. T. Chortyk
Keyword(s):  
Liquid Chromatography ◽  
Cigarette Smoke ◽  
Aromatic Hydrocarbons ◽  
Ultra Violet ◽  
Polynuclear Aromatic Hydrocarbons ◽  
Gel Chromatography ◽  
Cigarette Smoke Condensate ◽  
Gas And Liquid Chromatography ◽  
Silicic Acid Chromatography ◽  
Derivatives Of

AbstractThe methyl, multi-methyl, and ethyl derivatives of the polynuclear aromatic hydrocarbons (PAH) of cigarette smoke condensate (CSC) were isolated from the neutrals by silicic acid chromatography, solvent partitioning and gel chromatography. The procedure yielded a relatively pure PAH isolate amenable to further identifications. The multi-alkylated PAH were concentrated in the early gel fractions with parent and higher ring PAH found in subsequent gel fractions. It was shown that CSC is very rich in alkylated PAH, and their successful identification required extensive use of gas and liquid chromatography and ultra-violet and GC - mass spectrometric techniques. High-pressure liquid chromatography (HPLC) separated individual isomers of the alkylated PAH in complex GC peaks. PAH from indene to pentamethylchrysene were found. This report concludes our identification studies on the PAH of CSC and complements our two previous reports in this journal. Collectively, our studies have identified approximately 1000 PAH of cigarette smoke condensate and have led to the development of methods for the routine quantitation of PAH in smalI quantities of cigarette smoke condensate.

Sign in / Sign up

Export Citation Format

Share Document