微波消解-ICP-MS法测定5种玫瑰花茶矿物质元素含量及溶出度的研究

Determination of Minerals and Dissolution of Five Rose Tea by Microwave Digestion and ICP-MS

研究市售墨红玫瑰、金边玫瑰、平阴玫瑰、千叶玫瑰、大马士革玫瑰5种玫瑰花茶矿物质的含量,并探究其溶出度。采用电感耦合等离子质谱仪测定玫瑰花茶中的铬、钴、镍、砷、硒、镉、铅、钠、锰、铁、铜、锌、锶、镁、钾、钙的含量,利用原子荧光光度计测定玫瑰花茶中汞的含量。结果表明,5种玫瑰花茶中K元素含量最高,其次是Ca、Mg、Fe、Mn、Zn、Sr、Cu,Co、Ni和Se的含量极低,重金属元素均未超标。冲泡时间为25 min时溶出度较大;最佳冲泡次数为2次。冲泡性能最好的品种是墨红玫瑰花茶。

To investigate the mineral contents in five kinds of rose tea,namely Rose Crimson Glory,Rose Jinbian,Rose Pingyin,Rose centifolia and Rose damascene,and to explore their dissolution.The contents of chromium,cobalt,nickel,arsenic,selenium,cadmium,lead,sodium,manganese,iron,copper,zinc,strontium,magnesium,potassium and calcium in rose tea were determined by inductively coupled plasma mass spectrometry,and the contents of mercury in rose tea were determined by atomic fluorescence photometer.The results indicated that K was the most abundant element,followed by Ca,Mg,Fe,Mn,Zn,Sr,Cu,Co,Ni and Se.The contents of heavy metal elements in five kinds of rose tea did not exceed the standard.When the brewing time was 25 minutes,the dissolution degree reached the maximum.The best frequency of brewing was 2 times.Rose Crimson Glory possessed the best brewing performance.