고체상미량추출법을 이용한 BTEX와 MTBE의 경쟁적 추출효과 및 미량분석에 관한 연구
Competitive Extraction and Trace Analysis of BTEX and MTBE by Solid-Phase Microextraction (SPME)
안상우(한양대학교 건설환경공학과); 천석영(경기대학교); 이시진(경기대학교); 박재우(한양대학교); 장순웅(경기대학교)
26권 4호, 622~628쪽
초록
In this study, Solid-phase microextraction (SPME) with GC/FID was studied as a possible alternative to liquid-liquid extraction for the analysis of BTEX and MTBE. Experimental parameters affecting the SPME process (such as kind of fibers, adsorption time, desorption time, volume ratio of sample to headspace, salt addition, and magnetic stirring) were optimized. Experimental parameters such as CAR/PDMS, adsorption time of 20 min, desorption time of 5 min at 250°C, headspace volume of 50 mL, sodium chloride (NaCl) concentration of 25% combined with magnetic stirring were selected in optimal experimental conditions for analysis of BTEX and MTBE. The general affinity of analytes to CAR/PDMS fiber was high in the order p-Xylene>Toluene>Ethylbenzene>MTBE>Benzene. The linearity of R2 for BTEX and MTBE was from 0.970 to 0.999 when analyte concentration ranges from 30 μg/L to 500 μg/L, respectively. The relative standard deviation (% RSD) were from 2.5% to 3.2% for concentration of 100 μg/L (n=5), respectively. Finally, the limited of detection (LOD) observed in our study for BTEX and MTBE were from 7.5 μg/L to 15 μg/L, respectively.
Abstract
In this study, Solid-phase microextraction (SPME) with GC/FID was studied as a possible alternative to liquid-liquid extraction for the analysis of BTEX and MTBE. Experimental parameters affecting the SPME process (such as kind of fibers, adsorption time, desorption time, volume ratio of sample to headspace, salt addition, and magnetic stirring) were optimized. Experimental parameters such as CAR/PDMS, adsorption time of 20 min, desorption time of 5 min at 250°C, headspace volume of 50 mL, sodium chloride (NaCl) concentration of 25% combined with magnetic stirring were selected in optimal experimental conditions for analysis of BTEX and MTBE. The general affinity of analytes to CAR/PDMS fiber was high in the order p-Xylene>Toluene>Ethylbenzene>MTBE>Benzene. The linearity of R2 for BTEX and MTBE was from 0.970 to 0.999 when analyte concentration ranges from 30 μg/L to 500 μg/L, respectively. The relative standard deviation (% RSD) were from 2.5% to 3.2% for concentration of 100 μg/L (n=5), respectively. Finally, the limited of detection (LOD) observed in our study for BTEX and MTBE were from 7.5 μg/L to 15 μg/L, respectively.
- 발행기관:
- 한국물환경학회
- 분류:
- 환경공학