ICP-AES法测定云南8种花茶及其茶水中10种微量元素含量

利用微波消解样品,采用电感耦合等离子体-原子发射光谱法测定了康乃馨、金银花、菊花、勿忘我、金盏花、桃花、玫瑰、薰衣草等8种云南花茶及其茶水中K、Ca、Mg、Cu、Zn、Fe、Mn、Cd、Cr、Pb等10种微量元素的含量.结果表明：该方法的加标回收率在94.96%~105.81%之间,RSD值在0.41%~2.57%之间,具有较好的准确度和精密度；8种花茶中K、Ca、Mg、Cu、Zn、Fe、Mn含量较高,Cr、Cd和Pb含量普遍较低；不同种类花茶中,各元素的溶出率存在较大差异；茶水中K和Ca的含量较高,其他元素含量相对较低.结果可为进一步合理开发花茶药用价值提供科学依据.

Determination of ten trace elements in eight herbal flowers and their infusions from Yunnan province,China by ICP-AES

Ten contents of mineral elements such as K,Ca,Mg,Cu,Zn,Fe,Mn,Cd,Cr and Pb in eight herbal flowers （Dianthus caryophyllus,Lonicera japonica T.,Prunus persica,Chrysanthemum morifolium R.,Lavandula angustifolia M., Dianthus caryophyllus,Calendula officinalis L. and Rosa rugosa T.） and their infusions collected from Yunnan province,China,were determined by inductively coupled plasma-atomic emission spectrometry after microwave digestion.The results showed that the recovery rates were between 94.96 % and 105.81%,and the relative standard deviations were found below 3.0 %.There was significant differences existed in all element concentrations among different varieties of herbal flowers and their infusions.On the whole,the concentrations of K,Ca,Mg,Cu,Zn,Fe,Mn were relatively high,but those of Cd,Cr and Pb were low in the herbal flowers.The contents of K and Ca were higher than those of other elements in the herbal infusions.The experiment could provide an accurate and credible evidence for the reasonable medicinal use and deeper exploitation of these herbal flowers.