Optimization of Measurement Conditions for Geochemical Survey Sample Analysis by X-ray Fluorescence Spectrometry with Pressed Powder Pellet Sample Preparation

Yu-chun LIU; Qing-wen LIN; Ling MA; Shu-ting LIANG

doi:10.15898/j.cnki.11-2131/td.201801300014

Rock and Mineral Analysis > 2018 > 37(6): 671-677. > DOI: 10.15898/j.cnki.11-2131/td.201801300014

Yu-chun LIU, Qing-wen LIN, Ling MA, Shu-ting LIANG. Optimization of Measurement Conditions for Geochemical Survey Sample Analysis by X-ray Fluorescence Spectrometry with Pressed Powder Pellet Sample Preparation[J]. Rock and Mineral Analysis, 2018, 37(6): 671-677. DOI: 10.15898/j.cnki.11-2131/td.201801300014

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Optimization of Measurement Conditions for Geochemical Survey Sample Analysis by X-ray Fluorescence Spectrometry with Pressed Powder Pellet Sample Preparation

Institute of Geological Experiment of Anhui Province, Hefei 230001, China

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Received Date: January 29, 2018
Revised Date: July 29, 2018
Accepted Date: August 09, 2018
Published Date: October 31, 2018

Abstract

HIGHLIGHTS
(1) The optimal measurement scheme was established for XRF determination of geochemical survey samples.

(2) The accuracy of the method was proved to meet the quality control requirements of geochemical survey samples.

(3) The method provided basic data for formulating the local standard on analysis of regional geochemical survey samples.

ABSTRACT

BACKGROUNDPowder compaction is a widely used sample preparation method for X-ray Fluorescence Spectrometry. However, due to the existence of mineral and matrix effects, the measurement conditions should be optimized.
OBJECTIVESTo measure 24 major and minor elements in geochemical survey samples.
METHODSThe ZSX Primus Ⅱ type Wavelength Dispersive X-ray Fluorescence Spectrometer was used to determine the optimum experimental conditions, such as sample preparation pressure, working voltage and current of the instrument, spectral lines of the elements to be measured and the efficiency of the detector. The optimum experimental conditions were verified by analyzing the National Standard Materials (GBW07402, GBW07404, GBW07424, GBW07426, and GBW07429).
RESULTSAccording to the optimum experimental conditions, the National Standard Materials of soil and stream sediments are analyzed. Individual elements such as Na₂O in GBW07402 and Pb in GBW07404 have relative errors greater than 10%, and other elements have relative errors less than 10%. The relative errors meet the quality control requirements of geochemical survey samples.
CONCLUSIONSThe requirement of data quality monitoring has been achieved for the analysis of geochemical survey samples and the optimized instrument measurement conditions provide reliable basic data for such samples in China.
- geochemical survey samples,
- X-ray Fluorescence Spectrometry,
- analytical spectral lines,
- detector

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Optimization of Measurement Conditions for Geochemical Survey Sample Analysis by X-ray Fluorescence Spectrometry with Pressed Powder Pellet Sample Preparation

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