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KMID : 1024520100190121447
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Journal of the Environmental Sciences
2010 Volume.19 No. 12 p.1447 ~ p.1454
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Analysis of Volatile Fatty Acids in Air by Dynamic SPME
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Yu Mee-Seon
Yang Sung-Bong
Ha Nam-ki
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Abstract
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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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KEYWORD
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Environmental analysis, Volatile fatty acids, Dynamic SPME, SPDE
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