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고분해능질량분석기 기반의 표적, 추정, 비표적 분석기법을 활용한 수환경 미량오염물질 및 환경변환체 탐색: A review
전준호 ( Junho Jeon ),박나리 ( Naree Park ),이선홍 ( Sun-hong Lee ) 한국환경분석학회 2016 환경분석과 독성보건 Vol.19 No.4
Micropollutants including pharmaceuticals, personal care products, pesticides, etc., and their transformation products (TP) are widely distributed in environmental media. However, limited information on their occurrence and concentration is available, at least partially due to lack of precise, reliable analytical tools. Recently, highly advanced instrument such as high resolution mass spectrometry (HRMS) has been commercially available and applicable for the detection of micropollutants and TPs. In addition, HRMS relevant screening techniques, suspect and nontarget screening, have been developed and optimized to identify unpredictable and unknown pollutants at trace levels. In this review paper, prior micropollutants and their TPs are suggested via literature survey, and the procedure of target/suspect/nontarget screening for their identification are introduced in detail with technical steps. Finally, the applicability of HRMS-based identification methods is discussed with lessons from previous studies. Considering the accuracy and applicability, suspect/nontarget screening approaches with HRMS are expected to extend our knowledge on micropollutants and TPs under the cover.
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.
파노라마 영상을 위한 3차원 회전각 이용 영상 정합법 연구
조명아(Myeongah Cho),전준호(Junho Jeon),김준식(Junsik Kim),강동진(Dongjin Kang),김규헌(Kyuheon Kim) 한국방송·미디어공학회 2017 한국방송공학회 학술발표대회 논문집 Vol.2017 No.11
본 논문은 파노라마 영상 생성을 위한 새로운 영상 정합 방안을 제안한다. 기존의 영상 정합 알고리즘은 영상의 특징이 되는 특징점을 추출하고 영상을 변환하여 정합하는 방식을 사용하는데, 이는 긴 처리 시간을 가지는 단점이 존재한다. 이에 본 논문에서는 보다 향상된 처리 속도를 가지는 영상 정합 알고리즘을 위해, 카메라 센서를 이용한 영상 정합 방안을 제안한다. 본 논문에서는 카메라의 관성센서에서 추출되는 오일러각을 활용한 영상 정합 방안을 제안하고, 실험을 통하여 결과를 검증하며, 그 결과를 기존 영상 정합 알고리즘과 비교하였다.