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LC-HRMS 기반의 표적, 추정 및 비표적 분석기법을 이용한 화포습지 내 미량오염물질 및 대사체 분석
황수민,전준호 한국환경분석학회 2018 환경분석과 독성보건 Vol.21 No.4
Located in Gimhae, Hwapo is the biggest riverine wetland in the province of Gyeongsangsam-do, Korea, and is a major habitat for various species. However, it is suspected that various pollutants enter the wetlands from agricultural and industrial areas. This study identifies major organic pollutants in this wetland and their sources using high performance liquid chromatography-high resolution mass spectrometry during one summer season. Forty-five substances were selected for quantitative analysis using target screening, and other non-selected compounds were screened using suspect and non-target screening methods. The results were that 21 and 17 targeted substances were detected in July and August, respectively. Major pollutants in July and August were oxadiazon (July: 17-220 ng/L, August: 66-460 ng/L), carbendazim (July: 10-110 ng/L, August: 64-520 ng/L), caffeine (July: 33-1,100 ng/L, August: 56-580 ng/L), and niflumic acid (July: 23-75 ng/L, August: 42-290 ng/ L). Sampling sites S4 in July and S2 in August were the major inflow points. Ten substances (tricyclazole, hexaconazole, diuron, fexofenadine, irbesartan, simetryn, cimetidine, valsartan, tebuconazole, and benzotriazole) and four metabolites (valsartan acid, azoxystrobin acid, TEB_M324c, and 2-aminobenzimidazole) were tentatively identified through suspect and non-target screening, respectively.
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환경규제 대응을 위한 페인트 중의 중금속 분석용 인증 표준물질 개발
유병규,선일식 한국환경분석학회 2018 환경분석과 독성보건 Vol.21 No.4
In the areas of RoHS, WEEE, ELV and REACH, reinforcement of environmental regulations against harmful substances is a global trend not only in EC but also in all over the world. In the fields of Korea's major export products such as material parts, electrical and electronic products and automobile parts, we are responding to these regulations consistently. To develop reference material for analyzing lead and cadmium in paints, the candidate materials were produced through the screening process which separated shapes and sizes. To secure the traceability of the candidate materials produced, the characteristics and uncertainties are estimated by ICP-AES analysis using the primary reference material. The short-term and long-term stabilities also are evaluated in parallel. In order to calculate the final certification value of the candidate material, the verification were carried out by the performance evaluation through the comparison among the KOLAS (Korea Laboratory Accreditation Scheme) laboratories, and the CRM was produced in accordance with ISO Guide 35. The certified values and uncertainties of Pb and Cd of the final paint standard, determined according to the joint analysis among laboratories, are Pb [(191.4±3.1) mg/kg, (944.1±5.6) mg/kg] and Cd [(45.0±2.6) mg/kg, (225.5± 3.5) mg/kg]. These standard materials were developed to enhance the reliability of measurement analysis, including the validity and traceability of measurement results. Also it is expected that the CRM will be used as QCM (quality control material) for the product design and the process monitoring, so that regulation and management of hazardous heavy metals can be systematically implemented.
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LC-HRMS 기반의 표적, 추정 및 비표적 분석기법을 활용한 우포늪 수계 내 미량오염물질 분석
강대호 ( Daeho Kang ),전준호 ( Junho Jeon ) 한국환경분석학회 2018 환경분석과 독성보건 Vol.21 No.2
Upo Wetland, in Changnyeong-gun, Gyeongsangnam-do, is the largest inland wetland in Korea and a habitat for various species. However, due to agricultural activities in the surrounding area, diverse organic pollutants such as pesticides have flowed into the wetland ecosystem. This study analyzed the exposure of Upo wetland to organic pollutants (e.g., pesticides and pharmaceuticals) using LC-HRMS (Liquid Chromatography-High Resolution Mass Spectrometry). Twenty-six pesticides and pharmaceuticals were selected and quantitatively analyzed for target screening. As a result, eight pharmaceuticals (e.g., fluconazole, lincomycin, metformin, valsartan) and eight pesticides (e.g., tebuconazole, metalaxyl) were quantitatively identified. The major pesticides were tebuconazole (230-3,900 ng/L) and metalaxyl (53-980 ng/L), whereas metformin (20-220 ng/L) was the pharmaceutical with the widest concentration range. Metabolites of the two major pesticides TEB_M324c and metalaxyl acid were identified tentatively via suspect and nontarget screening which also identified several other substances including benzotriazole, carbendazim, diazinon, hexaconazole, methabenzthiazuron, tricyclazole, niflumic acid, 2-aminobenzimidazole, 2-isopropyl-6-methyl-4-pyrimidinol, valsartan acid, and retrorsine.
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액체크로마토그래피-텐덤질량분석법에 의한 하천수 중 남조류 독소 7종의 동시분석
이인정 ( Injung Lee ),김진아 ( Jina Kim ),안정민 ( Jung Min Ahn ),양득석 ( Duk-seok Yang ) 한국환경분석학회 2018 환경분석과 독성보건 Vol.21 No.2
Water blooms, formed by cyanobacteria such as Microcystis, Aphanizomenon, and Anabaena have been occurring frequently in lakes and rivers in Korea. As such, there is a need to develop a sensitive method to determine cyanobacterial toxins to minimize potential hazards in raw water resources. In this study, we developed a highly sensitive analytical method for seven cyanobacterial toxins (microcystin-LR, -RR, -YR, -LA, anatoxin-a, nodularin, and cylindrospermopsin) using liquid chromatography-tandem mass spectrometry (LCMS/ MS) with direct injection. The method was evaluated in terms of calibration curve linearity, limit of detection, limit of quantitation, accuracy, and precision. The limit of detection and limit of quantitation were in the range of 0.010-0.026 μg/L and 0.030-0.081 μg/L, respectively. Good accuracy and precision was also obtained. The optimized method was used to measure the concentrations of the seven cyanobacterial toxins in river water from Nakdong River, and microcystin-RR, -YR, and -LR were detected.
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