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The effect of cold trap adsorbents on the gas chromatographic analysis of ambient VOCs under Peltier cooling conditions
Author(s) -
Pal Raktim,
Kim KiHyun
Publication year - 2008
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.200700531
Subject(s) - tenax , calibration , chemistry , toluene , chromatography , benzene , gas chromatography , adsorption , analytical chemistry (journal) , thermoelectric effect , thermal desorption , cold trap , thermoelectric cooling , styrene , xylene , polymer , desorption , organic chemistry , thermodynamics , statistics , physics , mathematics , copolymer
In this work, the relative analytical performance of the GC‐based detection method was investigated with a major focus on cold trap (CT) adsorbent materials against four aromatic volatile organic compounds (VOCs) ( e. g. , benzene, toluene, xylene, and styrene). A series of calibration experiments were hence conducted under cryofocusing conditions formed by the Peltier cooling system in a thermal desorber (TD) unit. During the course of this study, comparative calibration datasets were acquired for each of the three CT types: (i) CT (I) = Carbopack B + Carbopack C, (ii) CT (II) = Carbopack B + Carboxen 1000, and (iii) CT (III) = Tenax TA. All calibration datasets were obtained under subambient temperature (–10°C) conditions controlled by the Peltier cooling system. The reliability of the calibration data was also assessed in an ancillary experiment with the aid of the modified injection through a thermal desorber (MITD) method. The results demonstrated that the GC detection properties of different VOCs were not altered significantly between different CT applications under Peltier conditions, although relative sensitivity could be distinguished moderately depending on the CT type.