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물시료 대용량 현장추출을 위한 PUF-ACF-PUF 방식의 소형 포집장치 개발과 적용: I. 다이옥신류
문부식 ( Bu Shik Moon ),김윤석 ( Youn Seok Kim ),김용연 ( Yong Yeon Kim ),최재원 ( Jae Won Choi ) 한국환경분석학회 2009 환경분석과 독성보건 Vol.12 No.4
Compact type large volume filtration system using polyurethane foam (PUF) and active carbon felt (ACF) was developed for the field sampling of persistent organic pollutants (POPs). To overcome clogging by particles in compact sampler, exception of GFF in front of PUF plug was unavoidable. Active carbon felt (ACF) layers were added between PUF slices to make up trap efficiency. Recovery tests in the lab using tap and surface water resulted in corresponding ranges of QA/QC of the accredited method for PCDD/Fs. Next, field applications for 100L volume were carried out using compact large volume sampler (LVS) with triplicates and TEQs were compared with the concentrations by conventional LVS (FS-142K model). Similar concentrations for real samples were observed between newly developed compact LVS and commercial LVS. The compact sampler would be useful as a complementary options in field water sampling.
중급 분해능 질량분석장치를 적용한 환경시료의 다이옥신 측정
최재원 ( Jae Won Choi ),김윤석 ( Youn Seok Kim ),문부식 ( Bu Shik Moon ) 한국환경분석학회 2009 환경분석과 독성보건 Vol.12 No.4
An middle resolution mass spectrometer (MRMS) with resolving power of approximately 3,000 (10% valley) was applied to the measurement of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in environmental samples such as sediment, soil and bottom ash. Similar range of relative response factors (RRFs) obtainable in the accredited method but higher relative standard deviations (RSD) were observed by MRMS with resolving power of 1,000. Some of recovery rates using the environmental reference material (RM) significantly exceeded the criteria of quality assurance/quality control (QA/QC), possibly due to the effect of ion suppression by interfering fragments originated from the sample matrices. MRMS was applied to the quantification of RM samples for sediment, soil and bottom ash. The results were compared to those obtained using a high resolution mass spectrometer (HRMS); the same sample preparation procedures were used. Elevated concentrations of each PCDD/F congeners and toxic equivalents were obtained by MRMS: 2 times higher for river sediment and 1.7 times higher for soil and bottom ash than those from the analysis using HRMS. From the result, it was concluded that a MRMS could be used as precautional screening methods for PCDD/Fs of the samples from highly contaminated areas.