Because the extract ag-ent used in this method is water,compared with the classical Bertrand metho-d,the result value is a little higher than its true value.

• 本文介绍了方法的测定步骤和注意点。 因为用这方法测定的浸提剂是水,所以与经典的Ber-trand 法相比,其结果比真实含量要稍高一点。