Determination of total mercury in bauxite and bauxite residue by flow injection cold vapour atomic absorption spectrometry

Bansal, Neetu, Vaughan, James, Boullemant, Amiel and Leong, Tony (2014) Determination of total mercury in bauxite and bauxite residue by flow injection cold vapour atomic absorption spectrometry. Microchemical Journal, 113 36-41. doi:10.1016/j.microc.2013.11.002


Author Bansal, Neetu
Vaughan, James
Boullemant, Amiel
Leong, Tony
Title Determination of total mercury in bauxite and bauxite residue by flow injection cold vapour atomic absorption spectrometry
Journal name Microchemical Journal   Check publisher's open access policy
ISSN 0026-265X
1095-9149
Publication date 2014-01-01
Sub-type Article (original research)
DOI 10.1016/j.microc.2013.11.002
Volume 113
Start page 36
End page 41
Total pages 6
Place of publication Philadelphia, PA, United States
Publisher Elsevier
Collection year 2014
Language eng
Abstract A simple method for precise and accurate determination of total mercury in bauxite and bauxite residue was developed by using the flow injection mercury system. Samples of the solid materials were first microwave digested in acidic and oxidising conditions to convert all mercury to an aqueous ionic form. Following filtration and dilution, ionic mercury was reduced to elemental mercury with acidic SnCl2 to produce a cold mercury vapour. The mercury absorbance calibration graph was linear up to 20μg·kg-1 with R2>0.999. The detection limits were determined to be 23ng·kg-1 and 17ng·kg-1 for bauxite and bauxite residue respectively. The relative standard deviation for 1μg·L-1 mercury standard solution (n=27) was 1.5%. In the absence of a certified bauxite reference material, accuracy of the method was tested with the closest available zinc concentrate reference material. Spiking known amounts of mercury in bauxite and bauxite residue samples was also tested; 95-111% recovery was obtained for both samples. The method developed in this paper is recommended for measuring total mercury in bauxite and bauxite residue.
Keyword Bauxite
Bauxite residue
FI-CV-AAS
Mercury determination
Microwave digestion
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 13 November 2013.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2015 Collection
 
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