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- 저자 : 白采善 (검색결과 43 건)
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酸性色素인 B.C.G와 B.C.P에 依한 Quinine sulfate, Quinine ethylcarbonate 및 Strychnine nitrate의 吸光光度定量法
劉永鍾,白采善 朝鮮大學校 師範大學 1975 師大論文集 Vol.6 No.-
The acidic dye technique was employed to analyse some medically important Alkaloid drugs quantitatively. The indicators, acidic dyes, Bromocresol green and Bromocresol purple were used as color-forming agents for Quinine sulfate, Quinine ethylcarbonate, and Strychnine nitrate. These Complexes were extracted with Organic solvents, and the intensity of the color (organic layer) was measured spectrophotometically. Linear relationships between concentration and absorbancy were obtained for the samples investigated. The mole ratio of the ion pair was as follows; B.C.G.-Quinine sulfate was 1:6, B.C.G.-Quinine ethylcarbonate was 1:4, and B.C.G.-Strychnine nitrate was 1:2. B.C.P.-Quinine sulfate was 1:3, B.C.P.-Quinine ethylcarbonate was 1:3, and B.C.P.-Strychnine nitrate was 1:2. These colored complexes were stable in chloroform and showed higher absorbancy than other organic solvents. The mixtures of acidic dye and sample were buffered at various pH. At pH 2.O of aqueous layer, B.C.G.-Quinine sulfate and B.C.G.-Quinine ethylcarbonate were extracted selectively. B.C.G.-Strychnine nitrate was extracted selectively at pH 4.O. B.C.P-Quinine sulfate and Quinine ethylcarbonate were extracted selectively at pH 4.O. B.C.P.-Strychnine nitrate was extracted selectively at pH 5.O. Favorable quantitative determinations for Quinine sulfate, Quinine ethylcarbonate and Strychnine nitrate had been achieved with the acidic dyes B.C.G and B.C.P. as color-forming agents.
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백채선,김의태 조선대학교 약학연구소 1998 藥學硏究誌 Vol.19 No.1
A rapid high-performance liquid chromatographic(HPLC) method for quantitative determination of fenoprofen in urine is described. The assay was performed after single extraction of fenoprofen and ibuprofen (internal standard) from urine using acetonitrile and eluted from a 5 pm C18 reversed phase column. The mobile phase consisted of acetonitrile + 0.5% phosphoric acid(50 : 50 v/v%) pumped isocratically at a flow rate of 1.0 mL/min. The effluent was monitored at 220 nm. Quantification was achieved by the measurement of the peak hight ratio, and the absolute recoveries ranged from 94.3 t o 103.0. Intra-day coefficients of variation(CV) ranged from 1.95 to 4.59%. and Inter-day coefficients of varidations(CV) ranged from 2.17 to 5.20 %
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백채선,김영수,Baek, Chae Sun,Kim, Young Su 한국임상약학회 2000 한국임상약학회지 Vol.10 No.1
A high-performance liquid chromatographic method with fluorometric detection was evaluated for analysis of ofloxacin in plasma. Biological fluids (plasma, $200\;{\mu}L$) were prepared for assay by protein precipitation with chlorofurm. The detection of ofloxacin and triamterene as an internal standard were performed at 358 nm for excitation and 495 nm for emission. The HPLC separation was carried out on Ultrasphere ODS column (4.6 mm${\times}25\;cm,\;5\;{\mu} m$) with acetonitrile $(45\%)$-phosphoric acid $(1.5\%)\;containing\;0.3\%$ sodium laurylsulfate as the mobile phase. The flow-rate was 1.0 mL/min. The calibration graphs were linear from 3.0 to 80 ng/mL with r=0.998. The minimal detectable concentration in plasma was 1.5 ng/mL. The proposed technique is reproducible, selective, reliable and sensitive.
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혈장중 Acebutolol 및 그 Acetyl 대사체의 HPLC 분석
백채선,Baek, Chai-Sun,Lin, Emil T. 한국약제학회 1993 Journal of Pharmaceutical Investigation Vol.23 No.3
A high-performance liquid chromatographic assay using ion-pair reverse-phase system was developed for the separation of acebutolol and acebutolol acetyl metabolite in plasma. A ion-pair reversephase system consisting of an ODS-bonded silica column and a mixture of 20% $CH_3CN$, 0.1% $H_3PO_4$, 0.035 M heptanesulfonic acid and 0.005 M tetrabutylammonium hydrogen sulfate as the mobile phase were used. Triamterene was employed as an internal standard. Based on 0.2 ml of plasma, the detection limits were 10.4 ng/ml for acebutolol and 10.3 ng/ml of acebutolol acetyl metabolite at the signal-to-noise ratio of 3:1.
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電荷移動 錯物形成에 의한 Methylephedrine·HCl의 分析學的 硏究
白采善,金永洙,劉永鍾 朝鮮大學校 1988 藥學硏究誌 Vol.10 No.1
The weak UV absorbing methylephedrine could be analyzed by chargetransfer spectrophotometric method The results obtained are summarized as follows 1. It was possible to determine a weak UV. absorbing methylephedrine using the intense charg-transfer UV band in chloroform 2. This method was suitalle for spectrophatometric determination of methylephedrine in mixed pharmaneutical preparatim 3. Linear relationship was found between absorbance and concentration 1.0×10^-5∼5×10^-5 M of methylephedrine(ε=1.68×10^4) 4. CT-complex of methylephedrine has absorption maxima at 293㎚ 5. CT-complex was formed in a 1:1 ratio between methylephedrine and iodine in chloroform 6. By UV,IR,^1H-NMR, DSC, and Xray diffraction spectrum, it could be inferred that CT-complex was formed by interaction between the basic nitrogen of methylephedrine as electron(n) donor and iodine as electron(σ) acceptor.
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電荷移動 錯物形成에 의한 Methylephedrine·HCI의 分石學的 硏究
白采善,金永洙,劉永鍾 朝鮮大學校 1988 藥學硏究誌 Vol.10 No.1
The weak UV absorbing methylephedrine could be analyzed by charge-transfer spectrophotometric method. The results obtained are summarized as follows. 1. It was possible to determine a weak UV. absorbing methylephedrine using the intense charge-transfer UV band in chloroform. 2. This method was suitalle for the spectrophatometric determination of methylephedrine in mixed pharmaceutical preparatim. 3. Linear relationship was found between absorbance and concentration 1.0 x 1O^(-5)~5 x 10^(-5)M of methylephedrine (ε=1.68 x 10⁴) 4. CT-complex of methylephedrine has absorption maxima at 293nm. 5. CT-complex was formed in a 1:1 ratio between methylephedrine and iodine in chloroform. 6. By UV, IR, ¹H-NMR, DSC, and X-ray diffraction spectrum, it could be inferred that CT-complex was formed by interaction between the basic nitrogen of methylephedrine as electron(n) donor and iodine as electron(σ) acceptor.
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吸光光度法에 의한 ProcaineㆍHC1과 LidocaineㆍHC의 分離定量
白采善,劉永精 朝鮮大學校 1976 綜合論文集 Vol.1976 No.-
A sensitive method for separative determining Procaine hydrochloride and Lidocaine hydrochloride in aqueous solutions is described, using Alizarin Red S as a complex forming agent. The method is based on the selective extraction of color-complex by specific organic solvent at an optimum pH and the intensity of color-complex can be quantitated spectrophotometically at 420nm. The Beer-Lambert law was adhered to over the 68.3-682.5㎍/ml of Procaine hydrochloride and the 54.2-216.8㎍/ml of Lidocaine hydrochloride. A stoichiometric relationship of 1:1.3 between Procaine hydrochloride. and the acid dye, and of 1:1.5 between Lidocaine hydrochloride and the acid dye is proved. The color was stable for at least 70min.
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