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pp.1447-1454
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.
1. 서 론
2. 재료 및 방법
2.1. 시약 및 Dynamic SPME
2.2. 표준가스 제작
2.3. 검량선 작성
3. 결과 및 고찰
3.1. 검량선 작성
3.2. 재현성(반복성) 실험
4. 결 론
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