TY - JOUR
T1 - Effects of sorbent materials on the cryofocusing analysis of gaseous reduced sulphur compounds
AU - Kim, Ki Hyun
AU - Pandey, Sudhir Kumar
AU - Ahn, J. H.
AU - Szulejko, J. E.
AU - Sohn, Jong Ryeul
N1 - Funding Information:
This study was supported by a National Research Foundation of Korea (NRF) Grant funded by the Ministry of Education, Science and Technology (MEST) [No. 2009-0093848].
PY - 2014/8/3
Y1 - 2014/8/3
N2 - The relative performance of different sorbent materials employed in the cryofocusing (e.g. in cold trap (CT) unit) stage was investigated at sub-ambient temperature by the thermal desorption (TD)-gas chromatography (GC)-pulsed flame photometric detector. To this end, the TD-based calibration of five reduced sulphur compounds (RSC: H2S, CH3SH, CS2, DMS and DMDS) and SO2 was carried out via the Peltier cooling system with five types of sorbent combinations such as two singlebed (Tenax TA and Silica gel) plus three multibed types (a combination of either two from the following three sorbents: Tenax TA, Silica gel and Carbopack B). Relative performance of each of all five CT options, if evaluated in terms of response factors for each compound, demonstrated that each CT composition acts as an important criterion to distinguish detection properties between light and heavy sulphur species. Although the relative response of H2S and CH3SH was systematically distinguishable between the CT types, that of SO2 was the most complicated to interpret. According to this study, the two CT types consisting of Carbopack B and Silica gel (CS-0.4 and CS-0.6) were the optimum choices for sulphur gas analysis in terms of basic QA parameters (sensitivity, reproducibility and linearity).
AB - The relative performance of different sorbent materials employed in the cryofocusing (e.g. in cold trap (CT) unit) stage was investigated at sub-ambient temperature by the thermal desorption (TD)-gas chromatography (GC)-pulsed flame photometric detector. To this end, the TD-based calibration of five reduced sulphur compounds (RSC: H2S, CH3SH, CS2, DMS and DMDS) and SO2 was carried out via the Peltier cooling system with five types of sorbent combinations such as two singlebed (Tenax TA and Silica gel) plus three multibed types (a combination of either two from the following three sorbents: Tenax TA, Silica gel and Carbopack B). Relative performance of each of all five CT options, if evaluated in terms of response factors for each compound, demonstrated that each CT composition acts as an important criterion to distinguish detection properties between light and heavy sulphur species. Although the relative response of H2S and CH3SH was systematically distinguishable between the CT types, that of SO2 was the most complicated to interpret. According to this study, the two CT types consisting of Carbopack B and Silica gel (CS-0.4 and CS-0.6) were the optimum choices for sulphur gas analysis in terms of basic QA parameters (sensitivity, reproducibility and linearity).
KW - Analytical bias
KW - Cold trap
KW - Cryofocusing
KW - Reduced sulphur compound
KW - Sorbent material
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U2 - 10.1080/09593330.2014.889217
DO - 10.1080/09593330.2014.889217
M3 - Article
C2 - 24956791
AN - SCOPUS:84899543787
VL - 35
SP - 1971
EP - 1978
JO - Environmental Technology (United Kingdom)
JF - Environmental Technology (United Kingdom)
SN - 0959-3330
IS - 15
ER -