关键词: ICP光谱法, 蒲公英茶, 微量元素, 溶出特性

Abstract: A method for the determination of trace elements zinc, copper, manganese, lithium, nickel, lead, strontium, cadmium, iron and barium in dandelion tea extract by inductively coupled plasma-optical emission spectrometry was established and the dissolution characteristics was studied. Under the optimal working conditions of ICP spectrometer, the wavelengths of the elements were chosen and the trace elements in the dandelion tea sample extract were analyzed with the recoveries of 95.7%~104.8% and relative standard deviation （RSD） of 1.0%~3.2%。The two methods of brewing and boiling had little effect on the dissolved amount of trace elements. The content of Sr in the dandelion tea extract was higher, followed by Mn and Zn, and neither Cd nor Pb was detected. The dissolved amount of trace elements in the dandelion tea extract increased linearly with the increase of brewing time. With the increase of the times of brewing, the dissolved amount of trace elements in the dandelion extract gradually decreased. After two times of brewing, the dissolution rate of Fe was 64.5%, and the dissolution rate of other trace elements was between 93.3%~100.0%.

Key words: ICP emission spectrometry, dandelion tea, trace elements, dissolution characteristics