Quick Search:       Advanced Search
CHEN Jing-wei,SONG Jiang-tao,CHEN Zhao-yang.Method Research on Determination of Barium Sulfate in Barite by X-ray Fluorescence Spectrometry[J].Rock and Mineral Analysis,2017,36(4):382-387
View Full Text   View/Add Comment   EndNote   BibTeX   Download reader
Method Research on Determination of Barium Sulfate in Barite by X-ray Fluorescence Spectrometry
Received:August 04, 2016  Revised:July 15, 2017
DOI:10.15898/j.cnki.11-2131/td.201608040115
Key words: barite  barium sulfate  acid treatment  alumina  sample preparation of glass melting  Wavelength Dispersion X-ray Fluorescence Spectrometry
Author NameAffiliation
CHEN Jing-wei The Fourth Exploration Institute of Geology and Mineral Resources of Shandong Province, Weifang 261021, China 
SONG Jiang-tao The Fourth Exploration Institute of Geology and Mineral Resources of Shandong Province, Weifang 261021, China 
CHEN Zhao-yang University of Jinan, Jinan 250022, China 
Hits: 224
Download times: 361
Abstract:
      X-ray Fluorescence Spectrometry (XRF) can be used to rapidly determine the total content of barium in barite. However, the barium carbonate included in the total barium will result in inaccurate results of barium sulfate. Moreover, copper, lead, zinc and other non-ferrous metal elements can damage the sample melting pot. Acid treatment is required to remove interference such as barium carbonate and lead. The residue ratio of the different samples after the acid treatment is different to before and the ratio of the flux to sample is uncertain, and thus the content of barium sulfate cannot be accurately determined. Therefore, it is essential to ensure that the melting agent has the same proportion as the sample. The sample pretreatment conditions, melting conditions and equipment conditions were optimized and are described in this paper. 10% hydrochloric acid mixed with 10% nitric acid was used to dissolve the sample. The sample solution was filtered to remove barium carbonate, calcium sulfate and copper, lead, zinc and other non-ferrous metal elements. Alumina oxide was added to undissolved samples after 700℃ calcination to reach the original sample weight, which attains the same proportion of flux and sample. Ammonium nitrate was used as the oxidant, and lithium bromide and ammonium iodide were used as demoulding agents. Samples were melted at 1075℃, and barium sulfate content in the barite was determined by XRF. The relative standard deviation (RSD) of the method is less than 0.4% and the detection limit is 72 μg/g. This method needs less detection time and suffers from less interference elements than determination by Inductively Coupled Plasma-Optical Emission Spectrometry, improving the test efficiency and analysis quality.