Determination of Trace Elements in Soil by Inductively Coupled Plasma-Mass Spectrometry with Ultrafine Slurry Sampling

Li-juan ZHANG; Tie-min XU; Peng-da FANG; Shuang WEI

doi:10.15898/j.cnki.11-2131/td.201712190195

2019 Vol. 38, No. 2

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Article navigation > Rock and Mineral Analysis > 2019 > 38(2): 147-153

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Li-juan ZHANG, Tie-min XU, Peng-da FANG, Shuang WEI. Determination of Trace Elements in Soil by Inductively Coupled Plasma-Mass Spectrometry with Ultrafine Slurry Sampling[J]. Rock and Mineral Analysis, 2019, 38(2): 147-153. doi: 10.15898/j.cnki.11-2131/td.201712190195

Citation:

Li-juan ZHANG, Tie-min XU, Peng-da FANG, Shuang WEI. Determination of Trace Elements in Soil by Inductively Coupled Plasma-Mass Spectrometry with Ultrafine Slurry Sampling[J]. Rock and Mineral Analysis, 2019, 38(2): 147-153. doi: 10.15898/j.cnki.11-2131/td.201712190195

Determination of Trace Elements in Soil by Inductively Coupled Plasma-Mass Spectrometry with Ultrafine Slurry Sampling

Tianjin Center of Geological Survey, China Geological Survey, Tianjin 300172, China

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Corresponding author: Tie-min XU, xutm1@163.com

Received Date: 19 December 2017

Revised Date: 23 April 2018

Accepted Date: 11 June 2018

Abstract

Abstract

BACKGROUNDSolid sampling technology applied in soil sample measurement has the limitation of sample size, and cannot be applied to the mainstream element analysis instrument. OBJECTIVESTo determine the trace elements by smashing soil samples to micron scale by high-speed grinding technology and under the action of a dispersant. METHODSThe ultra-fine grinding technology of soil samples was systematically studied. The sample was crushed to micron level in a few minutes in an ethanol medium. The prepared solid suspension was directly measured by ICP-MS, avoiding blockage of pneumatic atomizers. RESULTSThe determination of the reference materials shows that the solid suspension still has interference when the particle size is 6.8μm. By adding a small amount of hydrofluoric acid and nitric acid to modify the solid suspension, the solid particle size was reduced and thereby the impact of the sample size was reduced. The 13 trace elements of lithium, beryllium, vanadium, chromium, nickel, copper, zinc, rubidium, strontium, cadmium, cesium, barium and lead were successfully determined by ICP-MS. Accuracy experiment showed that the maximum relative error is 10.5%±3% and most of the elements have a relative error less than 5%. The precision experiment showed that most elements have a relative standard deviation (RSD) of less than 5.4%. CONCLUSIONSThe determination results meet the requirements of DZ/G 0130-2006 'Test of Geology and Mineral Resources Quality Management Standards'.
- ultrafine solid suspension /
- pneumatic atomizer /
- Inductively Coupled Plasma-Mass Spectrometry /
- soil /
- trace elements

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References

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