微波消解-ICP-AES法测定钒钛矿区优势植物中重金属含量

采用微波消解——电感耦合等离子发射光谱法(ICP-AES)对攀枝花某钒钛矿区十种优势植物地上部分和地下部分中Pb,Zn,Cu,Cr,Cd,Ti等无机元素含量进行了测定。结果表明,该方法相对标准偏差均在5.0%以下,通过加标回收实验,回收率在92.90%-103.85%之间,与传统的方法相比,本法具有较好的准确度和精密度,且灵敏度较高,能同时测量多种元素等优点。

Determination of heavy metals in dominant plant species in Vanadium/Titanium mine area by microwave digestion-ICP-AES

Ten kinds of dominant plants in Vanadium/Titanium mine area were collected, the contents of heavy metals including Pb, Zn, Cu, Cr, Cd and Ti of which aboveground and underground parts were determined by ICP-AES using microwave digestion, respectively. All samples of the plants were digested with HNO3-H2O2 system. The relative standard deviation was less than 5% for all the elements, and the recoveries were 92.90%-103.85% by adding standard recovery experiment. This method was simple, sensitive and precise and can perform simultaneous multi-elements determination compared with conventional method of the plants determination, which could satisfy the sample examination request and provide scientific rationale for determining inorganic elements of plants.