Determination of Selenium, Major and Minor Elements in Selenium-rich Soil Samples by X-ray Fluorescence Spectrometry with Powder Pellet Preparation

LI Ying-chun; ZHANG Lei; SHANG Wen-yu

doi:10.15898/j.cnki.11-2131/td.202007090102

Rock and Mineral Analysis > 2022 > 41(1): 145-152. > DOI: 10.15898/j.cnki.11-2131/td.202007090102

LI Ying-chun, ZHANG Lei, SHANG Wen-yu. Determination of Selenium, Major and Minor Elements in Selenium-rich Soil Samples by X-ray Fluorescence Spectrometry with Powder Pellet Preparation[J]. Rock and Mineral Analysis, 2022, 41(1): 145-152. DOI: 10.15898/j.cnki.11-2131/td.202007090102

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Determination of Selenium, Major and Minor Elements in Selenium-rich Soil Samples by X-ray Fluorescence Spectrometry with Powder Pellet Preparation

National Research Center for Geoanalysis, Beijing 100037, China

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Received Date: July 08, 2020
Revised Date: June 04, 2021
Accepted Date: August 11, 2021
Published Date: January 27, 2022

Abstract

HIGHLIGHTS
(1) A wavelength dispersive and energy dispersive X-ray fluorescence (WD-ED XRF) spectrometry method was established to determine the major and minor elements in selenium-rich soil.

(2) The technical difficulties in the determination of Se by XRF were investigated, and the analytical conditions were optimized reasonably.

(3) The method can be used to determine the high content of Se, and can also provide quantitative or approximate quantitative results of 16 major and minor elements.

ABSTRACT

BACKGROUNDAt present, the content of Se in soil is mainly determined by atomic fluorescence spectrometry, which has disadvantages such as large usage of acid and relatively complex pretreatment. Determination of high content of Se requires high dilution, which expands the analysis error.
OBJECTIVESTo establish a method for the determination of Se and other elements in Se-rich soil samples by wavelength dispersive and energy dispersive X-ray fluorescence (WD-ED XRF).
METHODSWD-ED XRF was used to determine 17 major and minor elements such as Se in Hubei selenium-rich soil samples with powder pellet. While 10 elements were analyzed by WD-XRF, As, Cu, Rb, Sr, Zr, Ba, Ni were analyzed by ED-XRF, which significantly reduced the measurement time.
RESULTSBy mixing different certified reference materials in proportion to configure mixed certified reference materials, the problem of insufficient content of the existing Se reference materials in the range of 5-72μg/g was solved. For the determination of high content Se, the relative standard deviation was less than 10%, and the RSD of high content Se sample was less than 0.70%, through the precision and accuracy assessment.
CONCLUSIONSThe proposed method satisfies the quantitative analysis of soil samples with Se content greater than 3.00μg/g, and provides the quantitative or approximate quantitative analysis results of 16 major and minor elements.
- selenium-rich soil samples,
- selenium,
- major and minor elements,
- powder pellet,
- X-ray fluorescence spectrometry,
- mixed certified reference materials

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References (33)

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ABSTRACT

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Determination of Selenium, Major and Minor Elements in Selenium-rich Soil Samples by X-ray Fluorescence Spectrometry with Powder Pellet Preparation