ICP-AES法测定八角茴香中14种微量元素

Determination of 14 trace elements in the star aniseed by ICP-AES

采用微波消解法处理八角茴香样品,电感耦合等离子体原子发射光谱(ICP-AES)法测定其中Mo,Cu,Cd,Mg,Pb,Zn,Mn,Fe,Al,Ni,Sr,As,Cr和Se 14种微量元素的含量。选择ICP仪器最佳测定条件为射频功率1300 W,载气流量0.2 L/min,冷却气流量15 L/min,等离子体气流量0.8 L/min,试样提升量1.5 mL/min。方法检出限为0.0002～0.006μg/mL,回收率为95.08%～105.20%,相对标准偏差(RSD)均小于3.71%。此法简便、快速、灵敏度高、准确性好、对环境污染小,可多元素同时测定。

The contents of 14 trace elements of Mo,Cu,Cd,Mg,Pb,Zn,Mn,Fe,Al,Ni,Sr,As,Cr and Se in the star aniseed were determined by ICP-AES,and the sample was pretreated by microwave digestion method.The ICP instrument work optimal conditions have been obtained as follows： RF power 1300 W,the flow rate of auxiliary gas 0.2 L/min,the flow rate of atomizer 15 L/min,sample uptake 0.8 mL/min,and plasma flow rate 15 L/min.The detection limits were 0.0002～0.006 μg/mL,and the recovery rates were 95.08%～105.20%,the precision was less than 3.71%.This method proved to be simple,rapid,accurate,less environment contamination,can determ many elements simultaneously.