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为了优化正丁醇溶液表面张力实验的数据处理方法,本文使用线性和非线性最小二乘曲线拟合方法拟合σ-c关系曲线,并比较了2种拟合方法在溶液表面张力实验数据处理中的应用效果,发现后者能更好地反映正丁醇水溶液表面张力与浓度的函数关系,拟合效果较好,拟合后的计算较简便,计算正丁醇分子截面积结果较准确。继续用后者处理舍弃了2个高浓度数据后的实验数据,拟合效果更好,计算分子截面积结果更准确。在处理正丁醇溶液表面张力实验数据时,应避免使用线性最小二乘曲线拟合方法,应使用非线性最小二乘曲线拟合方法。在正丁醇溶液表面张力实验中,应避免使用高浓度溶液,应使用较低浓度的溶液。
In order to optimize the data processing method of n-butanol solution surface tension experiment, we use the linear and nonlinear least-squares curve fitting method to fit the curve of σ-c, and compare the two fitting methods in the solution surface tension experimental data processing The results show that the latter can better reflect the surface tension of n-butanol solution as a function of concentration, the fitting effect is better, the calculation after fitting is simple, and the calculation of n-butanol molecular cross-sectional area is more accurate. Continue to use the latter to deal with the experimental data after discarding two high concentration data, the fitting effect is better, and the result of calculating the molecular cross-sectional area is more accurate. In dealing with the experimental data of n-butanol solution surface tension, the linear least squares curve fitting method should be avoided, and the nonlinear least square curve fitting method should be used. In the n-butanol solution surface tension test, should avoid the use of high concentrations of solution should be used at lower concentrations of solution.