电感耦合等离子体质谱(ICP-MS)法结合化学计量学分析比较6种松针中无机元素的含量

为研究甘肃地区松针中无机元素的含量，探究不同品种松针中无机元素的差异，采用HNO₃(65%)对松针样品进行微波消解，电感耦合等离子体质谱(ICP-MS)法测定甘肃两地区6种松针中28种无机元素的含量，结合主成分分析以及偏最小二乘判别分析对松针地区差异进行判别；结果显示松针中无机元素含量丰富，其中Na、Mg、Al、K、Ca、Fe、Zn、Mn、Sr等元素在不同品种松针中均有较高含量，主成分分析结果显示共有7个主成分，累积贡献率达到92.58%,偏最小二乘判别分析显示两地区6种松针在地区上可被明显分开，其中Mg、Fe、Zn、Mn、Sr、K 6种元素为造成地区差异的主要元素。实验结果表明松针中元素种类丰富，人体必需微量元素含量较高，且不同地区松针在地区上具有一定的一致性和特异性。

Comparing the contents of Inorganic Elements in Six Kinds of Pine Needles by Inductively Coupled Plasma Mass Spectrometry(ICP-MS) Combined with Chemometric Analysis

ABSTRACT To study the content of inorganic elements in pine needles in Gansu Province and explore the differences of inorganic elements in different varieties of pine needles, HNO3(65%), was used for microwave digestion of pine needles, and the contents of 28 inorganic elements in 6 kinds of pine needles in Gansu Province were determined by inductively coupled plasma mass spectrometry (ICP-MS). Combined with principal component analysis and partial least squares discriminant analysis, the regional differences of pine needles were identified; The results showed that the content of inorganic elements in pine needles was rich, among which Na, Mg, Al, K, Ca, Fe, Zn, Mn, Sr and other elements had high content in different varieties of pine needles. The results of the principal component analysis showed that there were 7 principal components, and the cumulative contribution rate reached 92.58%. Partial least squares discriminant analysis showed that the six kinds of pine needles in the two regions could be significantly separated from each other, among which mg, Fe, Zn, Mn, Sr and K were the main elements causing regional differences. The experimental results show that pine needles are rich in elements, the content of essential trace elements is high, and pine needles in different regions have certain consistency and specificity.