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2Â¥2010-05-24 17:32:59
hxg
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3Â¥2010-05-24 17:49:45
chim
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4Â¥2010-05-25 11:57:27
chim
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5Â¥2010-05-25 11:59:12
wutmail
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6Â¥2010-05-25 14:30:48
wutmail
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ÒѾÊÕ¼£¬¹§Ï²¡£ ±êÌâ: Flow injection chemiluminescence determination of levofloxacin in medicine and biological fluids based on its enhancing effect on luminol-H2O2 reaction ×÷Õß: Shao XD, Li Y, Liu YQ, et al. À´Ô´³ö°æÎï: SPECTROSCOPY-AN INTERNATIONAL JOURNAL ¾í: 23 ÆÚ: 3-4 Ò³: 209-216 ³ö°æÄê: 2009 ±»ÒýƵ´Î: 0 ¸ü¶àϸ½ÚÈçÏ£º ×÷Õß: Shao XD (Shao, Xiaodong)1, Li Y (Li, Ying)2, Liu YQ (Liu, Yangqin)1, Song ZH (Song, Zhenghua)3 À´Ô´³ö°æÎï: SPECTROSCOPY-AN INTERNATIONAL JOURNAL ¾í: 23 ÆÚ: 3-4 Ò³: 209-216 ³ö°æÄê: 2009 ±»ÒýƵ´Î: 0 ²Î¿¼ÎÄÏ×: 22 ÒýÖ¤¹ØÏµÍ¼ ÕªÒª: Levofloxacin{(-)-(S)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-7H-pyrido[ 1,2,3-de]-1,4-benzoxazine-6-carboxylic acid} is a synthetic fluorinated quinolone derivative, having activity against both Gram (+) and Gram (-) bacteria (aerobic and anaerobic) through inhibition of their DNA gyrase. In this paper, a simple flow injection chemiluminescence with luminol-hydrogen peroxide system was described for determining levofloxacin. The chemiluminescence intensity in the presence of levofloxacin was remarkably enhanced compared with that in the absence of it. Under the optimum reaction conditions the chemiluminescence increment produced was proportional to the concentration of levofloxacin in the range of 1.0-700.0 ng ml(-1) (R-2 = 0.9992), with a detection limit of 0.3 ng ml(-1) (3 sigma). At the flow rate of 2.0 ml min(-1), the whole process including sampling and washing could be completed in 0.5 min offering the sampling efficiency of 120 times h(-1) accordingly, and the relative standard deviation (RSD) was less than 3.0% (n = 5). The recovery for the levofloxacin samples was from 95.9% to 104.5%. It was satisfactory for the application to determine levofloxacin in pharmaceutical preparations, human urine and serum samples. ÎÄÏ×ÀàÐÍ: Article ÓïÑÔ: English ×÷Õ߹ؼü´Ê: Levofloxacin; chemiluminescence; flow injection; human serum and urine KeyWords Plus: PERFORMANCE LIQUID-CHROMATOGRAPHY; PHARMACEUTICAL-PREPARATIONS; GATIFLOXACIN; SPECTROMETRY; MOXIFLOXACIN; PLASMA ͨѶ×÷ÕßµØÖ·: Shao, XD (ͨѶ×÷Õß), China Natl Petr Corp, Tubular Goods Res Ctr, Xian 710065, Peoples R China µØÖ·: 1. China Natl Petr Corp, Tubular Goods Res Ctr, Xian 710065, Peoples R China 2. Xian Thermal Power Res Inst Co Ltd, Xian, Peoples R China 3. Northwestern Univ, Xian, Peoples R China µç×ÓÓʼþµØÖ·: shao1224@163.com ³ö°æÉÌ: IOS PRESS, NIEUWE HEMWEG 6B, 1013 BG AMSTERDAM, NETHERLANDS ѧ¿ÆÀà±ð: Spectroscopy IDS ºÅ: 492BY ISSN: 0712-4813 DOI: 10.3233/SPE-2009-0379 [ Last edited by wutmail on 2010-5-25 at 17:26 ] |
7Â¥2010-05-25 17:24:15
yuanfangad
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8Â¥2010-05-25 18:36:06
chim
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9Â¥2010-05-25 20:14:57
chim
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10Â¥2010-05-27 15:10:03













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