Identification of low-boiling fraction of pyrolysis oil

1983 ◽  
Vol 48 (1) ◽  
pp. 60-70
Author(s):  
Jan Novrocík ◽  
Marta Novrocíková
Keyword(s):  
Capillary Column ◽  
Glass Capillary Column ◽  
Gas Liquid Chromatography ◽  
Pyrolysis Oil ◽  
Glass Capillary ◽  
Identification Methods ◽  
Oil Fraction ◽  
Continuous Rectification ◽  
Determination Of Parameters

Composition of the low-boiling fraction of the pyrolysis oil obtained from continuous rectification has been determined by combination of capillary gas-liquid chromatography with other identification methods (catalytic hydrogenation, polymerization). In this way components have been identified which form overall 86.0 per cent (m/m) of the low-boiling fraction. The said pyrolysis oil fraction has been found to contain almost 50 per cent (m/m) of unsaturated components able of polymerization, especially methylindenes, methyl-, ethyl- and dimethylvinylbenzenes, divinylbenzenes and 1,2-dihydronaphthalene. Elution behaviour of all the identified isomeric methylindenes, divinylbenzenes and 1,2-dihydronaphthalene has been evaluated by determination of parameters of the equation Ist.phase (2) = k . Ist.phase(1) + q. The Kovats elution indices of all the identified aromatic hydrocarbons have been determined with the use of a glass capillary column wetted with Carbowax 20M at 80 °C.

scholarly journals Determination of N-Nitrosodimethylamine in the Smoke of High-Nitrate Tobacco Cigarettes

1973 ◽  
Vol 7 (2) ◽  
Author(s):  
G.P. Morie ◽  
C.H. Sloan
Keyword(s):  
Capillary Column ◽  
Glass Capillary Column ◽  
Gas Chromatograph ◽  
Ionization Detector ◽  
Glass Capillary ◽  
Flame Ionization ◽  
Basic Solutions ◽  
Poly Ethylene ◽  
Gas Chromatographic Method

AbstractA gas chromatographic method was developed for the determination of N-nitrosodimethylamine (NDMA) in cigarette smoke. The NDMA in the smoke of 200 cigarettes was trapped in a solution of sodium hydroxide and separated from most of the smoke components by distillation from acidic and basic solutions. The aqueous solution was extracted for 8 hr. into ethyl ether in a Dean Stark apparatus. To concentrate the solution of NDMA, the ether was distilled until only 5 ml of the solution remained. An aliquot of this solution was analysed by means of a gas chromatograph equipped with a 200-ft. glass capillary column coated with Carbowax 20-M poly(ethylene glycoI). An alkali metal flame ionization detector with a selectivity of 10*/1 for nitrogen compounds to normal hydrocarbons was used. Small amounts (2 ng) of nitrosamines in the presence of large amounts of other compounds were easily detected. N-nitrosodimethylamine-C

Identification and metabolic implication of 1-deoxyglucose (1,5-anhydroglucitol) in human plasma.

1982 ◽  
Vol 28 (6) ◽  
pp. 1283-1286 ◽  
Author(s):  
S Yoshioka ◽  
S Saitoh ◽  
T Fujisawa ◽  
A Fujimori ◽  
O Takatani ◽  
...  
Keyword(s):  
Liquid Chromatography ◽  
Human Plasma ◽  
Capillary Column ◽  
Physiological Role ◽  
Glass Capillary Column ◽  
Gas Liquid Chromatography ◽  
Liquid Chromatography Mass Spectrometry ◽  
Glass Capillary ◽  
Liquid Chromatograph

Abstract 1-Deoxyglucose (1,5-anhydroglucitol), a metabolite related to diabetes mellitus, was identified in human plasma by gas-liquid chromatography and by gas-liquid chromatography/mass spectrometry. Plasma polyols were accurately determined with a gas-liquid chromatograph equipped with an all-glass capillary column. The plasma content of 1-deoxyglucose in healthy persons varies with age. Although the precise physiological role of 1-deoxyglucose remains obscure, the method described here for determining the minor polyol components of plasma, as well as the findings of 1-deoxyglucose in the plasma of healthy subjects, may be useful for investigating the metabolic roles of 1-deoxyglucose.

scholarly journals Parameters Affecting the Selective Filtration of Certain Tobacco Smoke Components

1975 ◽  
Vol 8 (3) ◽  
Author(s):  
Gerald P. Morie ◽  
Cephas H. Sloan ◽  
Madelyn S. Baggett
Keyword(s):  
Cigarette Smoke ◽  
Tobacco Smoke ◽  
Chromatographic Method ◽  
Capillary Column ◽  
Distribution Coefficients ◽  
Glass Capillary Column ◽  
Glass Capillary ◽  
Selective Filtration ◽  
Gas Chromatographic Method

AbstractThe purpose of this investigation was to attain a better understanding of the selective removal of certain compounds from cigarette smoke by filters. A gas chromatographic method for the determination of selected semivolatile smoke compounds was developed. The method, which utilizes a 160 m glass capillary column, was used to determine the efficiency of filters for the removal of these selected semivolatile compounds. A correlation was found between the selective filtration of these compounds from cigarette smoke and their distribution coefficients [KSwhere b

Determination of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans in Commercial Pentachlorophenols by Combined Gas Chromatography-Mass Spectrometry

1976 ◽  
Vol 59 (3) ◽  
pp. 562-569 ◽  
Author(s):  
Hans-Rudolf Buser ◽  
Hans Paul Bosshardt
Keyword(s):  
Capillary Column ◽  
Gas Chromatography Mass Spectrometry ◽  
Glass Capillary Column ◽  
Specific Method ◽  
Mass Fragmentography ◽  
Glass Capillary ◽  
Mass Spectral Analysis ◽  
Mass Spectral ◽  
Gas Chromatographic Separation

Abstract Samples of commercial pentachlorophenol (PCP) and its sodium salt (PCP-Na) were examined for the presence of polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs), using a rapid, highly specific method of analysis. Phenolic compounds are removed by alkaline extraction, and the neutral components are fractionated on an alumina minicolumn. After gas chromatographic separation, individual PCDDs and PCDFs are detected by mass fragmentography and their presence is confirmed by complete mass spectral analysis. While some samples had only low amounts of PCDDs and PCDFs, others contained much higher amounts of these components. PCP-Na samples showed the unexpected presence of a tetrachlorodibenzo-p-dioxin. Re-analysis of PCP and PCP-Na samples with high PCDD contents on a high-resolution glass capillary column showed the presence of 3 hexa- and the 2 heptachlorodibenzo-p-dioxins with nearly constant isomeric ratios.

Resolution of alkenylacylglycerol moieties of natural glycerophospholipids by gas–liquid chromatography on polar capillary columns

1984 ◽  
Vol 62 (6) ◽  
pp. 352-362 ◽  
Author(s):  
J. J. Myher ◽  
A. Kuksis
Keyword(s):  
Liquid Chromatography ◽  
Carbon Number ◽  
Glass Capillary Column ◽  
Gas Liquid Chromatography ◽  
Glass Capillary ◽  
Practical Procedure ◽  
Flame Ionization ◽  
Column Wall ◽  
Layer Chromatography

A sensitive and practical procedure has been developed for the determination of the sn-1-alk-1-enyl-2-acylglycerol moieties of natural glycerophospholipids using capillary gas–liquid chromatography with flame ionization detection. The method gives excellent resolution and quantitative estimates for molecular species according to carbon number and degree of unsaturation. The diradylglycerols are released from the glycerophospholipids by hydrolysis with phospholipase C and the alk-1-enylacylglycerols are resolved by thin-layer chromatography. Either the trimethylsilyl or the tertiary-butyldimethylsilyl ethers are then resolved at 250 °C by gas–liquid chromatography on a glass capillary column wall-coated with a polar cyanopropylsiloxane polymer using hydrogen as the carrier gas. The method has been applied to the analysis of the alk-1-enylacyl- and diacyl-glycerol moieties of the phosphatidylethanolamines of rat heart and kidney.

Sign in / Sign up

Export Citation Format

Share Document