【摘要】 目的：建立微量酸消解-电感耦合等离子体质谱法检测潮汕凉茶中15种元素（Al、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、As、Se、Sr、Cd、Ba和Pb）的方法。方法：凉茶样品（200μL）经真空冷冻干燥，80℃水浴下使用65%硝酸（200μL）及30%过氧化氢（100μL）分别消解1 h及10 min，消解后用3%硝酸稀释至5 m L，再利用电感耦合等离子体质谱法测定Al、V、Cr等15种元素的含量。结果：15种元素的线性关系良好（r>0.999），检测限为0.009～14.788μg/L，精密度为0.7%～2.4%，加标回收率为84.0%～125.2%。9种凉茶中Al、V、Cr、Mn、Fe、Ni、As、Sr、Ba等9种元素含量存在差异（P<0.05）。结论：建立了微量酸消解-电感耦合等离子体质谱法检测潮汕凉茶中元素的方法，该方法简便、快速、准确。更多还原

【Abstract】 Objective: To establish a method for the determination of 15 elements(Al, V, Cr, Mn, Fe, Co, Ni, Cu,Zn, As, Se, Sr, Cd, Ba, and Pb) in Chaoshan herbal tea by trace acid digestion and inductively coupled plasma mass spectrometry. Methods: The herbal tea sample(200 μL) was freeze-dried under vacuum, and then dissolved in 65% nitric acid(200 μL) and 30% hydrogen peroxide(100 μL) at 80 ℃ for 1 h and 10 min, respectively, and then diluted to 5 m L with 3% nitric acid, and then the content of 15 elements, including Al, V, Cr, etc., were determined by inductively coupled plasma mass spectrometry. Results: The linearity of the 15 elements was good(r>0.999), the detection limits were 0.009-14.788 μg/L, the precision ranged from 0.7% to 2.4%, and the spiked recoveries ranged from 84.0% to 125.2%. The contents of the nine elements in the nine kinds of herbal teas, such as Al, V, Cr, Mn, Fe, Ni, As, Sr, and Ba, differed from each other(P<0.05). Conclusion: A method for the determination of elements in Chaoshan herbal tea by trace acid digestion and inductively coupled plasma mass spectrometry has been established, which is simple, rapid and accurate.更多还原