The correlation r in methanol,acetone,chloroform and butanol was respectively 0.999 9,0.999 9, 0.998 4 and 0.999 8.The recovery was 96.0%,97.3%,81.1% and 93.9% with RSD 2.7%,1.9%,8.8% and 2.5%,(n=5) respectively.

• 甲醇、丙酮、氯仿、正丁醇线性关系r分别为 0 .；9999；