Abstract：The accuracy and stability of surface tension measurements are improved fitting the entire surface profile in the pendent drop method with an algorithm to determine the initial value for two-dimensional optimization. Moreover, the error function was modified by a weighting factor which reduced the influence of the droplet profile deviation point on the surface tension measurement. The full-profile fitting method was used to calculate the surface tension of water and ethanol at 25℃ and atmosphere. The final results show the standard deviation was reduced by 40% compared with the previous method, which verifies the stability and repeatability of this full-profile fitting pendent drop method.
周斌, 李思维, 陈志勇, 张嵘. 完全轮廓法计算液体表面张力的改进[J]. 清华大学学报（自然科学版）, 2016, 56(12): 1352-1356.
ZHOU Bin, LI Siwei, CHEN Zhiyong, ZHANG Rong. Full-profile fit pendent drop method for surface tension measurements. Journal of Tsinghua University(Science and Technology), 2016, 56(12): 1352-1356.
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2016, Vol. 56 
