TY - JOUR
T1 - Measuring real-time concentration trends of individual VOC in an elementary school using a sub-ppb detection μGC and a single GC-MS analysis
AU - Jian, Rih Sheng
AU - Sung, Lung Yu
AU - Lu, Chia Jung
N1 - Funding Information:
The National Science Council of ROC (Taiwan) provided funding for this research under the following project number: 100-2113-M-003-001-MY2 .
PY - 2014/3
Y1 - 2014/3
N2 - This paper reports the results from a field study that used a micro gas chromatograph (μGC) in conjunction with single gas chromatography-mass spectrometry (GC-MS) analysis to obtain the time-dependent concentration changes of individual volatile organic compounds (VOCs). The μGC is capable of performing sub-ppb analysis every 15. min and has a total weight of only 3. kg, which includes an embedded tablet computer. The field study was conducted in an elementary school near a chemical industrial area. Six VOCs including acetone, 2-butanone, methyl acetate, toluene, m-xylene and isobutyl acetate, were detected at low ppb levels via canister/GC-MS analysis. Five of the six chemicals were successfully quantified using the μGC. The lone exception was acetone, which prematurely breakthrough on the preconcentrator of the μGC because of its high volatility. The continuous analyses performed by the μGC revealed the individual temporal trends of the concentrations for the remaining 5 chemicals. The establishment of real-time trends for each of the chemicals enabled a detailed examination of their correlations.
AB - This paper reports the results from a field study that used a micro gas chromatograph (μGC) in conjunction with single gas chromatography-mass spectrometry (GC-MS) analysis to obtain the time-dependent concentration changes of individual volatile organic compounds (VOCs). The μGC is capable of performing sub-ppb analysis every 15. min and has a total weight of only 3. kg, which includes an embedded tablet computer. The field study was conducted in an elementary school near a chemical industrial area. Six VOCs including acetone, 2-butanone, methyl acetate, toluene, m-xylene and isobutyl acetate, were detected at low ppb levels via canister/GC-MS analysis. Five of the six chemicals were successfully quantified using the μGC. The lone exception was acetone, which prematurely breakthrough on the preconcentrator of the μGC because of its high volatility. The continuous analyses performed by the μGC revealed the individual temporal trends of the concentrations for the remaining 5 chemicals. The establishment of real-time trends for each of the chemicals enabled a detailed examination of their correlations.
KW - Environmental monitoring
KW - Micro gas chromatograph
KW - Real-time analysis
KW - Volatile organic compounds
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U2 - 10.1016/j.chemosphere.2013.10.094
DO - 10.1016/j.chemosphere.2013.10.094
M3 - Article
C2 - 24314896
AN - SCOPUS:84893777410
SN - 0045-6535
VL - 99
SP - 261
EP - 266
JO - Chemosphere
JF - Chemosphere
ER -