5楼: Originally posted by rongzhang at 2012-04-15 10:18:58:
i think that it is caused by the impurity in the solution, generally speaking, pure liquid should not appear the least point in surface tension.

2楼: Originally posted by 诚实守信为荣 at 2012-04-14 20:13:48:
最低点一般都是里面含有杂质才会出现，楼主确定是纯物质，另外测试过程中，是否有误差存在，你使用的是什么方法测试的表面张力？

3楼: Originally posted by sdjnliuxin at 2012-04-14 22:51:39:
是纯物质，而且我已经重复了三次试验，每次都重新配溶液，结果都一样。我用的是吊片法测的，实验前我都确保刷干净仪器。