ISSN:
1040-7685
Keywords:
cryogenic concentrator
;
injector/trap
;
large-volume injection
;
twodimensional capillary gas chromatography
;
mass spectrometry
;
matrix-isolation FT-IR
;
perfume analyses
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A versatile sample introduction system or injector/trap (I/T), described in this paper, is a stand-alone, computer-controlled, cryogenic concentrator with provisions for solvent venting and inert sample transfer. The I/T is designed to provide a common interface between the column and a variety of sampling modules.Modules to perform thermal desorption and pyrolysis, as well as modules for remote sampling (pre-traps) have been developed. Large volumes of either gaseous or liquid samples can be introduced by means of pre-traps packed with suitable substrates. Pretraps packed with Tenax TA allowed quantitative recovery of compounds as volatile as n-decane (n-C10) when contained in a 1-mL volume of pentane. The introduction of a 1-mL sample makes it possible to reach a detection limit of ca. 100 ppt,ppt, ppb, ppm refer to parts-per-trillion (1012), billion (109), and million (106), respectively. with an FID, for compounds with boiling points ≥n-C9.The capability to do trace analyses with the I/T is enhanced by interfacing it to a twodimensional gas chromatograph (2D/GC) equipped with a mass-selective detector (MSD) and a matrix isolation fourier transform infrared spectrometer (MI FT-IR). The resulting instrumentation greatly facilitated the identification of organic compounds present at ppbconcentrations in perfume samples.
Additional Material:
11 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mcs.1220030402
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