ISSN:
1612-1112
Keywords:
Headspace analysis
;
Static
;
Trapping of analytes
;
Tenax GC
;
Sample-addition calibration
;
Sensitivity of analysis
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Summary A method is described which makes it possible to with-draw in a defined way headspace gas samples amounting to as much as several tens of milliliters from an equilibrated gas-liquid system. The apparatus consists of an equilibration vessel provided with a septum through which a Tenax GC-packed trap can be connected with the headspace compartment via an injection needle. At the bottom of the vessel, a syringe is situated by means of which a liquid sample is introduced into the vessel. A portion of liquid sample is introduced into the equilibration vessel, equilibrium is established, a certain volume of the headspace gas is pushed out through the trap by introducing another portion of liquid sample, and the analytes entrapped are determined by GC. Then the entire procedure is repeated, and the initial contents of the analytes in the liquid sample are calculated from the two GC analyses. The possibilities and reliability of the method are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02258927
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