| HE Pan-hong,YANG Zhen,GONG Zhi-xiang.Simultaneous Determination of Trace Arsenic, Copper, Lead, Zinc, Nickel and Vanadium in Soils by Hydride Generation-Inductively Coupled Plasma-Optical Emission Spectrometry[J].Rock and Mineral Analysis,2020,39(2):235-242 |
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| Simultaneous Determination of Trace Arsenic, Copper, Lead, Zinc, Nickel and Vanadium in Soils by Hydride Generation-Inductively Coupled Plasma-Optical Emission Spectrometry |
| Received:April 16, 2019 Revised:August 14, 2019 |
| DOI：10.15898/j.cnki.11-2131/td.201904160048 |
| Key words: soil arsenic metal elements simultaneous determination hydride-generation determination inductively coupled plasma-optical emission spectrometry |
| Author Name | Affiliation | | HE Pan-hong | Henan Province Nuclear Industry Geology Bureau, Zhengzhou 450044, China
Henan Radionuclide Detection Center of Nuclear Industry, Zhengzhou 450044, China | | YANG Zhen | Henan Province Nuclear Industry Geology Bureau, Zhengzhou 450044, China
Henan Radionuclide Detection Center of Nuclear Industry, Zhengzhou 450044, China | | GONG Zhi-xiang | School of Chemistry, Biology and Material Science, East China University of Technology, Fuzhou 344000, China |
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| Abstract: |
BACKGROUND: Hydride generation-atomic fluorescence spectrometry (HG-AFS) is widely used for the determination of arsenic in soil. Inductively coupled plasma-optical emission spectrometry (ICP-OES) is widely used in the simultaneous determination of multiple elements, but the detection limit of arsenic is slightly higher. The combination of hydride generation technology and ICP-OES has been widely studied, which can greatly reduce the detection limit of arsenic and yield the simultaneous determination of arsenic, antimony, bismuth, mercury and other elements. However, the combination technology can only be used to determine easy hydrogenation elements but it cannot simultaneously determine easy hydrogenation elements and difficult hydrogenation elements.
OBJECTIVES: To obtain the simultaneous determination of arsenic and various metal elements in samples by one dissolved sample and one apparatus.
METHODS: The soil samples were dissolved by hydrofluoric acid, nitric acid, perchloric acid and hydrochloric acid, followed by the addition of thiourea ascorbic acid solution to reduce arsenic to +3, by using 10% hydrochloric acid as the dissolving medium. The elements were determined by double flow method at the same time.
RESULTS: For the coexisting ions in the solution, La and Dy higher than 1.0mg/L had interference on the determination of arsenic. These elements had no effect on the determination of arsenic, when K, Na, Ca, Mg, and Fe concentrations were lower than 50.0mg/L, Pb, Mo, Zn, Cu, Ba, Ti, Mn, Ni, Sr, V, when Cr concentrations were lower than 20.0mg/L, and Co, Ag, U, Cd, Li, Au concentrations were lower than 10.0mg/L.
CONCLUSIONS: This method improves the sensitivity of arsenic and has the advantages of multi-element simultaneous determination. It can simultaneously determine trace arsenic and difficult hydrogenation elements such as copper, lead, zinc, nickel, and vanadium. The relative standard deviation (RSD) of the method is less than 5%. This method is confirmed by soil standard materials and is proved to be reliable and suitable for the simultaneous determination of trace arsenic and other elements. |
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