| 异丙醇-环己烷双液系标准曲线的拟合研究 |
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| 引用本文： | 赵晓洋,冯云晓.异丙醇-环己烷双液系标准曲线的拟合研究[J].高师理科学刊,2010,30(3). |
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| 作者姓名： | 赵晓洋 冯云晓 |
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| 作者单位： | 1. 河南工业职业技术学院,化学工程系,河南,南阳,473009
2. 平顶山学院,化学化工学院,河南,平顶山,467000 |
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| 摘 要： | 对异丙醇-环己烷完全互溶双液系的标准曲线,在常温常压下为稍弯曲的曲线而非直线进行了探讨.结果表明,是由于溶液中2物质混合后的偏摩尔体积与纯物质的摩尔体积不同所致,并且组成的表示方式不同,拟合结果的线性相关系数不同.提出在使用标准曲线法时,应选择合适的组成表示方式使线性相关系数接近于1,以提高测未知液组成的准确度.
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| 关 键 词： | 标准曲线 折光率 组成表示 偏摩尔体积 |
Study on standard curves fitting for two-component liquid system of the Isopropanol-Cyclohexane |
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| ZHAO Xiao-yang,FENG Yun-xiao.Study on standard curves fitting for two-component liquid system of the Isopropanol-Cyclohexane[J].Journal of Science of Teachers＇College and University,2010,30(3). |
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| Authors: | ZHAO Xiao-yang FENG Yun-xiao |
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| Institution: | 1.Department of Chemical Engineering; Henan Polytechnic Institute; Nanyang 473009; China; 2.School of Chemistry and Chemical Engineering; Pingdingshan University; Pingdingshan 467000; China); |
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| Abstract: | Discussed that the standard curve for two-component liquid system of the Isopropanol-Cyclohexane at room temperature and pressure is bending rather than straight.The reason of curve bending was due to the partial molar volume different from the molar volume of pure substances.The result showed that the different composition expressions caused the different linear correlation coefficients.When using the standard curve,we should select the appropriate composition expression so that the linear correlation coef... |
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| Keywords: | standard curve refractive index composition expression partial molar volume |
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