电感耦合等离子体质谱同时测定螺旋藻保健品中16种元素含量

目的建立微波消解-电感耦合等离子体质谱法同时测定螺旋藻保健品中Na、Mg、Al、K、Ca、Cr、Mn、Fe、Co、Ni、Cu、Zn、As、Se、Cd、Pb等16种矿物元素含量的方法。方法螺旋藻保健品经处理后加入硝酸,通过微波消解,采用电感耦合等离子体质谱法对其中的16种矿物元素含量进行测定,通过在线添加内标溶液对结果进行实时校正。结果建立的方法 16种元素线性关系良好(r2≥0.99),检出限低,精密度在8.61%以内,加标回收率在86%～112%之间。结论该方法操作简单、灵敏度高、准确可靠,适用于螺旋藻保健品中多种矿物元素含量的同时测定。

Simultaneous determination of the 16 kinds of mineral elements content in spirulina supplements by inductively coupled plasma-mass spectrometry

Objective To establish a method for simultaneous determination of 16 kinds of elements including Na, Mg, Al, K, Ca, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Cd, Pb in spirulina supplements by microwave digestion-inductively coupled plasma mass spectrometry (ICP-MS). Methods After treatment, spirulina supplements were added with nitric acid. The content of 16 mineral elements were determined by ICP-MS after microwave digestion. Results The correlation coefficient of working curves of this method were greater than 0.99. This method showed a low limit of detection, the relative standard deviations were under 8.61%, and the recoveries rates were in the range of 86%-112%. Conclusion This method is simple, sensitive and accurate, which is suitable for the simultaneous determination of multiple elements in spirulina supplements.