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- 저자 : 서천규 ( Cheon Kyu Seo ) (검색결과 2 건)
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LC/ESI-MS/MS를 이용한 축산폐수처리장의 의약물질 모니터링
서천규 ( Cheon Kyu Seo ),김병주 ( Byung Ju Kim ),조현우 ( Hyun Woo Cho ),남윤구 ( Youn Ku Nam ),김탁현 ( Tak Hyun Kim ),이면주 ( Myun Joo Lee ),명승운 ( Seung Woon Myung ) 한국환경분석학회 2009 환경분석과 독성보건 Vol.12 No.4
In this study, an effective monitoring and the investigation of treatment efficiency of pharmaceuticals from the influent and effluent of livestock wastewater treatment plants (WWTPs) by LC/ESI-MS/MS was performed. Thirteen pharmaceuticals including anntibiotics, growth promoters and disinfectants were assayed from twelve WWTPs in South Korea. The analytical method for pharmaceuticals from wastewater samples gave above 60% of recoveries from the spiked blank samples. The calibration curves showed good linearities (above r2=0.99) in the concentration range of 0.01~10.00 ng/mL. Limits of detection (LOD, at S/N>3) were the range of 0.00128~0.04505 ng/mL, and methods detection limits (MDL, at RSD<20% and S/N>10) were 0.00552~0.15015 ng/mL in surface water. Accuracy and precision from spiked blank samples were -12.4~20.6% and 0.6~24.0% from spiked blank samples, respectively. The established method could be used to determine low concentration levels of pharmaceuticals in environmental samples. From few influents of livestock WWTPs, chlortetracycline and acetaminophen were detected with the highest concentration (70.87 μg/ mL and 1.35 μg/mL, respectively) among the monitoring pharmaceuticals. And also lincomycin, sulfathiazole, sulfamethazine, trimethoprim, acetyl salicylic acid, tylosin, glutaraldehyde and formaldehyde were detected with 0.21~294.02 ng/mL from the influents of WWTPs.
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HPLC/ESI-MS/MS를 이용한 환경 시료중 Estrogens의 분석
서천규 ( Cheon Kyu Seo ),명승운 ( Seung Woon Myung ) 한국환경분석학회 2010 환경분석과 독성보건 Vol.13 No.3
Trace concentrations of estrogens such as 17β-estradiol (E2), 17α-estradiol (αE2), estrone (E1), estriol (E3), and 17α-ethinylestradiol (EE2) may have adverse effects on humans and the aquatic ecosystem. The environmental analysis of estrogens at physiologically active concentrations (low ng/L) requires the use of very sensitive and selective method. An analytical procedure for the simultaneous determination of five steroid estrogens in an aqueous environmental sample is described. The procedure includes solid phase extraction/clean-up with C18 cartridge, and analysis by liquid chromatography/tan dem mass spectrometry of five estrogens. After 500 mL of sample loading on C18 cartridge, sample was eluted with acetonitrile and dryness. The reconstituted analytes were separated on HPLC system with 0.1% formic acid and acetonitrile followed by analyzed using (-) electrospray ionization-mass spectrometer with multiple reaction monitoring mode. In the range of 0.05-1 ng/mL, the calibration curves were showed the good linearities (above r2=0.99). The limits of detection and limits of quatitation estimated for the estrogens in blank surface water were the concentration range of 0.055~0.154 ng/mL and 0.184~0.514 ng/mL, respectively. The absolute recovery, precision (intra-day) and accuracy in the low, medium and high (0.005~1.0 ng/mL) were in the range of 69.5~95.1%, 0.4~7.9% (RSD) and -9.1~9.3% (bias), respectively.
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