Comparison of Liquid-Liquid Extraction and Solid-Phase Extraction Coupled with GC/MS for Determination of Priority Pollutants in Water

액체 추출법과 고체상 추출법에 의한 수질 중 유해물질 농축법 비교

Two extraction methods, liquid-liquid extraction(LLE) and solid-phase extraction(SPE), coupled with GC/MS were compared as preconcentration procedures for priority pollutants in water. Among the semi-volatile priority pollutants, 11 acid and 44 base/neutral compounds were spiked in reagent water. With LLE, which is a modification of EPA Method 625, the overall mean recovery of the 54 compounds was 91% with a mean relative standard deviation(RSD) of 4.6%. With SPE, the overall mean recovery of the 52 compounds was 53% with a mean RSD of 8.9%. The detection limits of both methods were in the range of $1{\sim}5{\mu}g/l$.

수질에서 유해물질을 농축하는 방법으로 액체 추출법과 고체상 추출법을 GC/MS를 검출기로 사용하여 비교하였다. 비휘발성 유해물질 중 11종의 산과 44종의 염기/중성 화합물들을 reagent water에 첨가하여 분석한 결과, 액체추출법은 54종의 화합물에 대해 91%의 평균회수율과 4.6%의 평균상대표준편차를 나타내었으며, 고체상 추출법은 52종의 화합물에 대해 63%의 평균회수율과 8.9%의 평균상대표준편차를 보였다. 두 방법의 검출한계는 $1{\sim}5{\mu}g/l$였다.