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Aluminum in rocks: Optimized microwave-assisted acid digestion and UV-Vis spectrophotometric measurement
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2023, v.36 no.5, pp.216-223
https://doi.org/10.5806/AST.2023.36.5.216
(Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam)
(Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam)
(Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam)
(Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam/Vietnam National University, Ho Chi Minh City, Vietnam)
(Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam/Vietnam National University, Ho Chi Minh City, Vietnam)
(Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam)
(School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea (Received July 2, 2023)
(Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam)
(Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam)
(Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam)
(Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam/Vietnam National University, Ho Chi Minh City, Vietnam)
(Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam/Vietnam National University, Ho Chi Minh City, Vietnam)
(Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam)
(School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea (Received July 2, 2023)
(Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam)
Nguyen,
T.
, Thai,
H.
, Le-Thi,
A.
, Do,
M.
, Le-Thi,
H.
, Le,
Q.
, Nguyen-Thi,
K.
, &
Nguyen,
C.
(2023). Aluminum in rocks: Optimized microwave-assisted acid digestion and UV-Vis spectrophotometric measurement. Analytical Science and Technology, 36(5), 216-223, https://doi.org/10.5806/AST.2023.36.5.216
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Abstract
Aluminium (Al) is one of the major elements in rocks and its concentration can be varied, depending on different rock types as well as sources. The present study aimed to propose an analytical method based on the UV-Vis as a cheap, simple, and common instrument equipped in most laboratories for Al quantification in rocks after the microwave assisted acid digestion. The aluminone and 8-hydroxyquinoline were investigated for the colorimetric assay. The results show that the 8-hydroxyquinoline reagent was more favorable in terms of the minimized affects of the potential interferences present in the digested solutions, i.e., Fe3+, Si4+ and F–. The calibration curve was constructed from 0.10 mg/L to 3.00 mg/L with the goodness of linearity (R2 = 0.9996). The limits of detection and quantification (LOD and LOQ) were estimated, i.e., 0.029 mg/L and 0.087 mg/L, respectively. The 8-hydroxyquinoline was applied to real rock samples, demonstrating favorable precision (RSD = 0.34 %-1.8 %) and no remarkable differences were found compared to the inductively coupled plasma-mass spectrometry (ICP-MS) as a reference measurement approach.
- keywords
- Al, rocks, aluminone, 8-hydroxyquinoline, colorimetric
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