Turkish Journal of Chemistry
Abstract
In whole-rock geochemical analysis, the quantification of aluminum in geological samples is performed using differentanalytical techniques including UV-Vis spectrophotometry. During the spectrophotometric analysis of aluminum utilizing AlizarinRed S, iron causes significant interference, leading to inaccurate measurements of the amount of aluminum in the sample. In caseswhere leached or processed samples contain titanium, interference is also observed. However, appropriate masking agents can removethese interferences. In this study, various masking agents including Tiron, oxalic acid, ascorbic acid, and thioglycolic acid were utilizedfor the masking of iron. Among these masking agents, ascorbic acid proved to be the best candidate for masking iron. A simple andefficient method was then developed for the masking of iron with the optimization of parameters including concentration of ascorbicacid and reaction time. With this technique, 2 mL of ascorbic acid (10%) can mask iron at up to 3000 ppm in aliquots. Moreover,titanium interference is not observed with this method when the titanium concentration in the aliquot is below 100 ppm. This methodwas subsequently applied to geological samples and the results were compared to those of atomic absorption spectroscopy. Most samplescan easily be analyzed for aluminum by utilizing this masking technique and circumventing interference problems.
Author ORCID Identifier
HAFIZMUHAMMADAHSANHAMAYUN AABIDININAM UL HASSANZUBAIR RAHIMBHATTIIMTIAZ: 0000-0000-0000-0001
TARIQ YASIN: 0000-0002-9121-4041
ASIF RAZA: 0000-0003-3069-8027
DOI
10.55730/1300-0527.3713
Keywords
Masking of iron, titanium, spectrophotometric, analysis of aluminum, Alizarin Red S, geological samples
First Page
89
Last Page
102
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
AABIDIN, HAFIZ ZAIN UL; INAM UL HASSAN, MUHAMMAD; YASIN, TARIQ; ZUBAIR RAHIM, MUHAMMAD; BHATTI, AHSAN AMIN; IMTIAZ, HAMAYUN; and RAZA, ASIF
(2025)
"Masking of iron and other interferences during the spectrophotometric analysis of aluminum from soil samples using Alizarin Red S,"
Turkish Journal of Chemistry: Vol. 49:
No.
1, Article 8.
https://doi.org/10.55730/1300-0527.3713
Available at:
https://journals.tubitak.gov.tr/chem/vol49/iss1/8