Determination of Trace Concentrations of Aliphatic Amines in the Gas Phase after Preconcentration on a Solid Sorbent

1994 ◽  
Vol 59 (11) ◽  
pp. 2415-2425 ◽  
Author(s):  
Karel Ventura ◽  
Kateřina Svobodová ◽  
Miroslav Dostál ◽  
Jaroslav Churáček
Keyword(s):  
Gas Chromatography ◽  
Gas Phase ◽  
Aliphatic Amines ◽  
Secondary Amines ◽  
Solid Sorbent ◽  
Liquid Phases ◽  
Trace Concentrations ◽  
Tenax Gc ◽  
Primary Aliphatic Amines

The technique of trapping aliphatic amines from gaseous and liquid phases on solid polymeric organic sorbents followed by thermal desorption and quantitation by gas chromatography or, after conversion to fluorescent (UV) derivatives, by liquid chromatography was studied. The interaction of 8 primary aliphatic amines and 4 secondary amines with 3 sorbents, viz. Tenax GC, Chromosorb 103, and Separon SE, was examined. Analytical GC and HPLC procedures were developed for butylamine and subsequently tested on a C4 - C7 primary alkylamine mixture.

Gas Chromatographic Determination of Primary and Secondary Amines as Pentafluorobenzamide Derivatives

1982 ◽  
Vol 65 (5) ◽  
pp. 1066-1072
Author(s):  
Brian D Ripley ◽  
Bruce J French ◽  
Lloyd V Edgington
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Analytical Method ◽  
Chromatographic Determination ◽  
Sample Volume ◽  
Secondary Amines ◽  
Primary And Secondary Amines

Abstract An analytical method is described for the determination of mono- and dialkylamines in foodstuffs. Amines are derivatized to their pentafluorobenzamides which may be separated by gas chromatography (GC) and determined using an N-P detector. Analysis of the derivatives by GC-mass spectrometry indicated they were all mono-substituted. The amines were isolated from foodstuffs by alkaline distillation of ≥75% sample volume. The distribution of dimethylamine (DMA) in distillate volumes indicated 2 maxima from barley and malt, which could represent 2 or more sources of DMA. DMA concentrations of 6.6-8.8 ppm in barley, 11 ppm in malt, and 1.2 ppm in beer are higher than previously reported.

Determination of Hydrocarbon Solubility in Sea Water and the Analysis of Hydrocarbons in Water-Extracts

1973 ◽  
Vol 1973 (1) ◽  
pp. 223-227 ◽  
Author(s):  
Stanley P. Wasik ◽  
Robert L. Brown
Keyword(s):  
Gas Chromatography ◽  
Gas Phase ◽  
Sea Water ◽  
Water Extract ◽  
Complex Mixtures ◽  
Hydrocarbon Group ◽  
Water Extracts ◽  
Peak Areas ◽  
Overlapping Peaks

ABSTRACT An apparatus is described for measuring the solubility of hydrocarbons in sea water and for analyzing hydrocarbons in water-extracts. The relative concentrations of the hydrocarbons in the gas phase in equilibrium with the water extract were determined by gas chromatography. A known volume of the gas phase was purged out from the apparatus and replaced with helium. The concentration of the hydrocarbons were measured after the second equilibration. The solubility of the hydrocarbon solutes in the sea water extract were determined from the peak area ratios of the solute peaks and the volume of the apparatus. Complex mixtures of hydrocarbons in aqueous solutions may be analyzed using this apparatus by examining the chromatograms obtained after each flush out. The peaks are identified as to hydrocarbon group (olefinic, aromatic, paraffinic) from the rate that the solute peak area decreases after each flush out. Overlapping peaks may be resolved using this technique. By extrapolating peak areas to zero flush out, the concentration of each solute in the original extract may be obtained. The analysis of a non-lead gasoline in sea water is presented.

scholarly journals Simultaneous Determination of Four Aldehydes in Gas Phase of Mainstream Smoke by Headspace Gas Chromatography-Mass Spectrometry

2019 ◽  
Vol 2019 ◽  
pp. 1-6 ◽  
Author(s):  
Xiaotao Zhang ◽  
Ruoning Wang ◽  
Li Zhang ◽  
Jianke Wei ◽  
Yibin Ruan ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Gas Phase ◽  
Gas Chromatography Mass Spectrometry ◽  
Headspace Gas Chromatography ◽  
Mainstream Smoke ◽  
Chromatography Mass Spectrometry ◽  
Headspace Gas ◽  
Cigarette Mainstream Smoke

A method for simultaneous determination of acetaldehyde, propionaldehyde, acrolein, and crotonaldehyde in gas phase of cigarette mainstream smoke by headspace gas chromatography-mass spectrometry was developed and validated. Gas phase components of mainstream cigarette smoke were extracted with methanol, and then the samples were separated on a DB 624 (60 m, 0.32 mm x 1.8 mm) column, analyzed with headspace gas chromatography-mass spectrometry, and quantified by isotope internal standard. The linearities of acetaldehyde, propionaldehyde, acrolein, and crotonaldehyde were good (R2>0.992). The recoveries of acetaldehyde, propionaldehyde, acrolein, and crotonaldehyde were between 78.5% and 115%. The relative standard deviations were less than 10%. The limits of detection and limits of quantitation were 0.014 μg/cigarette ~0.12 μg/cigarette and 0.045 μg/cigarette ~0.38 μg/cigarette, respectively. The method had advantage of high sensitivity, it did not require derivatization of 2,4-dinitrophenylhydrazine and avoided a large number of adverse reactions during the process of derivation to improve the accuracy of result, and it was suitable for quantitative analysis of four aldehydes in gas phase of cigarette mainstream smoke.

Sign in / Sign up

Export Citation Format

Share Document