期刊
SEPARATION SCIENCE AND TECHNOLOGY
卷 52, 期 7, 页码 1289-1297出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01496395.2017.1287200
关键词
Thorium; flotation-assisted homogenous liquid-liquid microextraction; Box-Behnken design; water samples
资金
- Islamic Azad University, Arak Branch
- Geological Survey of Iran
A fast, simple, and efficient method for extraction, preconcentration, and determination of thorium in water samples with acceptable recoveries based on flotation-assisted homogenous liquid-liquid microextraction combined with inductively coupled plasma-mass spectrometry (ICP-MS) is presented. Various parameters affecting the extraction efficiency were optimized by Box-Behnken design. Under the optimum conditions (concentration of dimethyl vinyl phosphonate = 2.4 x 10(-4) mol/L, pH = 6.5, n-heptane = 150 L, and acetonitrile = 0.5 mL), the calibration graph was linear in the range of 10.0-400.0 ng/L for thorium. The limit of detection of this method was 2.62 ng/L, and the enrichment factor was estimated to be 136 for thorium.
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