电感耦合等离子体光谱/质谱法测定环境样品中的硼

Determination of Boron in Environmental Samples by Inductively Coupled Plasma Atomic Emission Spectrometry/Mass Spectrometry

采用HF-HNO3-H3PO4-HClO4密封溶样处理样品,电感耦合等离子体光谱/质谱法(ICP-AES/MS)测定农作物、膳食和粪便中的硼。所拟定的方法在测硼的同时,还可测定Cr、Cu、Li、V、Co、Zn、Sr、Cd、Ba、K、Na、Fe、Mn、Zn元素,可以为农作物和饮食中痕量元素研究提供参考。ICP-AES测定硼的方法检出限(3σ)为0.0063μg/mL,测定限(10σ,DF=100)为2.10μg/g;ICP-MS测定硼方法检出限(3σ)为0.0228ng/mL,测定限(10σ,DF=1000)为0.092μg/g。方法经植物国家一级标准物质GBW07602～07605验证,测定值与标准值接近,样品10次测定的RSD<10%。

The application of ICP-AES/MS for determination of boron in crop,meal and faeces samples are described. The detection limits were 2.10 μg/g and 0.092 μg/g for ICP-AES (10σ, DF=100) and ICP-MS (10σ, DF=1 000)respectively. The accuracy and precision of the method were demonstrated by analyzing different Chinese geological certified reference materials. The results were in good agreement with the certified values. The method has been successfully used in practice.