- Volume 19 Issue 12
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Analysis of Volatile Fatty Acids in Air by Dynamic SPME
Dynamic SPME를 이용한 공기 중 지방산 분석
- Yu, Mee-Seon (Department of Chemistry, University of Ulsan) ;
- Yang, Sung-Bong (Department of Chemistry, University of Ulsan) ;
- Ha, Nam-Ki (Department of Chemistry, University of Ulsan)
- Received : 2010.10.08
- Accepted : 2010.12.03
- Published : 2010.12.31
In this study, the detection limits of lower fatty acids in air were investigated by using Dynamic SPME(Solid Phase Micro-Extraction), i.e. improved Head Space - SPME method(HS-SPME). This Dynamic SPME, called SPDE(Solid Phase Dynamic Extraction), is the analytical method for volatile compounds in air with the extraction by using a stainless steel needle of which inner surface is coated with adsorption material and following the gas chromatographic analysis by inserting the needle into a injection port of GC and subsequently, desorption of the volatile compounds into a gas-chromatographic column. Extraction was carried out by passing the sample air through the needle with a suction pump which has been used for a detection tube. The result of measurement for the 6 lower fatty acids showed that the detection limits ranged from 0.10 ppm to 0.44 ppm and the linear correlation coefficients were over 0.99. Relative standard deviations obtained from 5 analytical repetition of a ca. 1.6 ppm standard mixture were in the range of 1.87%~2.47%. This method has been shown to be a adequate for the measuring C2~C5 fatty acids in air in the concentrations of over several hundreds ppb.
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