| 分光光度指示剂法测定槐定碱的电离常数 |
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| 引用本文： | 王国清,杨波,刘迎春,李品春,刘志华.分光光度指示剂法测定槐定碱的电离常数[J].沈阳药科大学学报,2000,17(6):427-428. |
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| 作者姓名： | 王国清 杨波 刘迎春 李品春 刘志华 |
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| 作者单位： | 沈阳药科大学基础部沈阳 110015 |
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| 摘 要： | 槐定碱对紫外及可见光无吸收 ,选择 42 0nm为分析波长 ,以间硝基酚为指示剂 ,用分光光度指示剂法测定槐定碱的电离常数 ,其 pKa值为 8 97± 0 0 2 ,与用电位滴定法和 pH薄层色谱法测得的结果基本一致 .
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| 关 键 词： | 分光光度指示剂法 槐定碱 电离常数 |
| 修稿时间： | 2000年5月11日 |
Determination of the Ionization Constant of Sophoridine by the Spectrophotometric Indicator Method |
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| Wang Guoqing,Yang Bo,Liu Yingchun,Li Pinchun,Liu Zhihua.Determination of the Ionization Constant of Sophoridine by the Spectrophotometric Indicator Method[J].Journal of Shenyang Pharmaceutical University,2000,17(6):427-428. |
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| Authors: | Wang Guoqing Yang Bo Liu Yingchun Li Pinchun Liu Zhihua |
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| Affiliation: | Wang Guoqing,Yang Bo,Liu Yingchun,Li Pinchun,Liu Zhihua Department of Basic Courses,Shenyang Pharmaceutical University,Shenyang 110015 |
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| Abstract: | Sophoridine lacks an absorption spectrum for determination of p K a.Hence 420 nm was selected for the analytical wavelength, m -nitrophenol was chosen as an indicator.The ionization constant of sophoridine was determined by the spectrophotometric indicator method.It was p K \+T\-a=8 97±0 02 at (25±0 5)℃,and the result was basically compatible with those values in literature. |
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| Keywords: | spectrophotometric indicator method sophoridine ionization constant |
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