Imidaclothiz residue in tea was determined by high performance liquid chromatography（ HPLC）,using different extractants including hexane,acetonitrile,acetone,hexane-acetonitrile（ 1∶ 1）,acetonitrile-acetone（ 1∶ ...Imidaclothiz residue in tea was determined by high performance liquid chromatography（ HPLC）,using different extractants including hexane,acetonitrile,acetone,hexane-acetonitrile（ 1∶ 1）,acetonitrile-acetone（ 1∶ 1） and hexane-ethyl acetate（ 1∶ 1）. The results indicated that all the extractants displayed excellent extraction capacities of imidaclothiz residue in tea and insignificant interference on the accuracy. Under the optimized extraction volume（ 20 ml）,the recovery values were in the ranges of 82. 3%-100. 7%,85. 8%-101. 1%,85. 9%-95. 2%,82. 3%-101. 3%,82. 4%-100. 5% and 88. 6%-102. 3%,respectively,with the relative standard deviations smaller than 10%. Moreover,mixed solvent showed improved extraction capacity,and the highest extraction capacity and promoted stability were approached by using hexane-ethyl acetate（ 1∶ 1） as coextractants.展开更多
基金Supported by Special Fund for International S&T Cooperation Project of China(2015DFA41280)Guizhou Science and Technology Program(QKHWGZ[2015]7001)
文摘Imidaclothiz residue in tea was determined by high performance liquid chromatography（ HPLC）,using different extractants including hexane,acetonitrile,acetone,hexane-acetonitrile（ 1∶ 1）,acetonitrile-acetone（ 1∶ 1） and hexane-ethyl acetate（ 1∶ 1）. The results indicated that all the extractants displayed excellent extraction capacities of imidaclothiz residue in tea and insignificant interference on the accuracy. Under the optimized extraction volume（ 20 ml）,the recovery values were in the ranges of 82. 3%-100. 7%,85. 8%-101. 1%,85. 9%-95. 2%,82. 3%-101. 3%,82. 4%-100. 5% and 88. 6%-102. 3%,respectively,with the relative standard deviations smaller than 10%. Moreover,mixed solvent showed improved extraction capacity,and the highest extraction capacity and promoted stability were approached by using hexane-ethyl acetate（ 1∶ 1） as coextractants.
