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고상추출법과 액액추출법을 이용한 수질 시료 중 Hexabromocyclododecanes (HBCDs) 분석법 연구
이두희 ( Hye Ri Lee ),정인영 ( In-young Chung ),이혜리 ( Hye Ri Lee ),김혁 ( Hyuk Kim ),박상아 ( Sang-ah Park ),김일규 ( Il-gyu Kim ),도영선 ( Young-sun Do ),이원석 ( Won Seok Lee ),최종우 ( Jong Woo Choi ) 한국환경분석학회 2016 환경분석과 독성보건 Vol.19 No.2
In this study, we evaluated analytical methods for the determination of three hexabromocyclododecane diastereomers (α, β, γ-HBCD) using solid-phase extraction (SPE) and liquid-liquid extraction (LLE). Instrumental analysis was conducted using high-performance liquid chromatography with a triple-quadrupole mass spectrometer (LC/MS/MS), and the hydrophilic-lipophilic balance (HLB) cartridge was used for SPE. SPE showed the highest recovery when using ethyl acetate as the eluent, and 40% methanol was used as the clean-up solvent. In LLE, a multilayer column using AgNO3 showed a low recovery rate. The respective method detection limits (MDLs) and the limits of quantitation (LOQs) of HBCDs in water were 0.068-0.145 ng/L and 0.217-0.462 ng/L for SPE, and 0.043-0.293 ng/L and 0.135-0.932 ng/L for LLE. The accuracy ranged from 96.3% to 104.3% for SPE and 99.3% to 101.2% for LLE. The precision values for both SPE and LLE were less than 5.98%.
흡입챔버 내 Didecyldimethyl Ammonium Chloride 및 Ethylene Glycol 혼합물질 분석법 연구
이두희 ( Doo Hee Lee ),이진선 ( Jin Seon Lee ),권정택 ( Jung Taek Kwon ),권도영 ( Do Young Kwon ),김은지 ( Eun Ji Kim ),박상아 ( Sang Ah Park ),이혜리 ( Hye Ri Lee ),김현미 ( Hyun Mi Kim ),이원석 ( Won Seok Lee ) 한국환경분석학회 2015 환경분석과 독성보건 Vol.18 No.2
This study evaluated analytical methods for the mixture of ethylene glycol (EG) and didecyldimethyl ammonium chloride (DDAC), which are used as the main components of deodorants and biocides. EG and DDAC were nebulized in aerosol into inhalation chambers. For absorbents of EG and DDAC, XAD-7 OVS resin and glass fiber (GF) filters were used, respectively. Instrumental analysis was conducted with gas chromatography/ flame ionization detector (GC/FID) for EG and high performance liquid chromatography with triple-quadrupole mass spectrometer (LC/MS/MS) for DDAC. The method detection limit (MDL) and the limit of quantitation (LOQ) were 24 μg/m3 and 77 μg/m3 for EG, and 13 ng/m3 and 41 ng/m3 for DDAC. The recovery rates ranged from 100.7% to 105.5% for EG, and 97.4% to 98.9% for DDAC. The relative standard deviation (RSD) of EG and DDAC ranged less than 5.72%. Daily monitoring was also conducted at the concentration of 0.2% for 7 days. The results showed that the mean values ranged from 0.728 mg/m3 to 0.739 mg/m3 and the overall accuracy was 11.9% to 16.2%.
김명옥 ( Myeong Ock Kim ),정인영 ( In Young Chung ),이혜리 ( Hye Ri Lee ),김금희 ( Kum Hee Kim ),최성헌 ( Sung Hun Choe ),이두희 ( Doo Hee Lee ),이원석 ( Won Seok Lee ),최종우 ( Jong Woo Choi ),권오상 ( Oh Sang Kwon ) 한국환경분석학회 2015 환경분석과 독성보건 Vol.18 No.1
This study was performed in order to establish a reasonable assigned value and target standard deviation in various matrices from proficiency test results. RPDs between manufactured PT sample concentrations and robust or normal averages were lower than 5% in almost all items except in water, drinking water, waste and soil and 5% to 9.5% in organic solvents and organo-phosphate pesticides. Robust averages and robust standard deviations from 2002 to 2012 were calculated and Coefficient of variation (CV) was used as statistical tools to find the target standard deviation in each fields. As a result, CV of all items except mercury and arsenic showed less than 10% in water and drinking water fields. CV of mercury and arsenic was less than 20%. Most items of heavy metal in waste and soil showed less than 15%. Therefore, it is determined to be reasonable that the standard deviation of future itemized goal is calculated by multiplying the coefficient of variation of the statistical processing results during 11 years. These results will contribute to providing reliable evaluation criteria and relevant information when establishing the PT evaluation guidelines according to ISO 17043 in various fields.