摘要： 将超声搅拌悬浮液进样技术应用于火焰原子吸收光谱法，成功地测定了茶叶中铜、铁、锌、锰的含量，此法快速、简单、准确。样品在(80±2)℃烘干4 h后，研磨过160目筛，然后加入5 mL 0.15%琼脂悬浮液，用超声搅拌混匀后直接上机测定。测定结果与传统湿法一致，t检验表明两者无显著性差异，相对误差＜±0.96%。
关键词：悬浮夜进样技术;火焰原子吸收法;茶叶;微量元素;超声搅拌
Abstract：It is known that some minerals and trace elements such as Cu, Fe, Zn and Mn are the necessary elements in human body. The lack of these elements can cause various diseases. Because tea contains all kinds of minerals and trace elements, drinking tea is healthy for people. In order to contrast teas of different sort grades and producing areas the minerals and trace elements in the tea have been determined using suspension sample introduction technique. To determine the content of trace elements in tea-leaves, samples were powdered and sieved after being heated at (80±2)℃ for 4 hours. 5 mL 0.15 % agar solution was added and mixed thoroughly with the samples by ultrasonic agitation. Then the prepared suspension of sample was directly introduced to FAAS for determination. The results of this method are consistent with those obtained by wet treatment method, and the relative deviation of treatment method is less than ±0.96%. The t-test shows that no difference was found. The present method is convenient, rapid and accurate.
