氢化物发生-原子荧光光谱法测定土壤中水溶态和可交换态锑(Ⅲ)和锑(Ⅴ)

基金项目:

国土资源地质大调查项目资助（1212010511218）

Determination of Water Soluble and Exchangeable Sb(Ⅲ) and Sb(Ⅴ) in Soil Samples by Hydride Generation-Atomic Fluorescence Spectrometry

1.
Institute of Geophysical and Geochemical Exploration， Chinese Academy of Geological Sciences
2.
Institute of Geophysical and Geochemical Exploration， Chinese Academy of Geological Sciences

摘要: 在0.10 mol/L酒石酸介质中，采用氢化物发生-原子荧光光谱法测定土壤中水溶态和可交换态Sb(Ⅲ)和Sb(Ⅴ)。以氢气发生器为氩-氢火焰提供氢气，明显降低了硼氢化钾浓度，改善了测定检出限。考察了酒石酸掩蔽Sb(Ⅴ)的量及共存干扰元素的允许量。方法检出限Sb(Ⅲ)为0.026 ng/L，总Sb为0.019 ng/L。加标回收试验表明，方法准确、可靠。
- 氢化物发生；原子荧光光谱法；氢气；水溶态；可交换态；锑(Ⅲ)；锑(Ⅴ)；土壤
Abstract: A method for the determination of water soluble and exchanged Sb(Ⅲ) and Sb(V) in soil samples was established using hydride generation-atomic fluorescence spectrometry in medium of 0.10 mol/L tartaric acid. The detection limit was remarkably improved and the concentration of KBH4 used was reduced due to the use of pure H2from hydrogen generator and steady Ar-H2 flame. Dosage of masking agent of tartaric acid and tolerance amounts of coexisted elements were also investigated. The detection limits of the method are 0.026 ng/L for Sb(Ⅲ) and 0.019 ng/L for total Sb. The accuracy of the method was verified by recovery tests on spiked samples.
- hydride