Abstract
The complexation between trimethoxyphenylfl uorone (TMPF) and Al 3+ is sensitive at pH 10.98 in the presence of both cetyltrimethylammonium bromide (CTAB) and acetone. CTAB was used as a sensitizer to bind TMPF and acetone as a stabilizer to inhibit the oxidation of the TMPF-Al complex. The masking reagent, ethylenediaminetetraacetic acid (EDTA) is helpful to improve the selectivity of the complexation. The spectral correction technique was applied to characterize the Al-TMPF complex and the formation of Al (TMPF)2 complex. The light-absorption ratio variation approach (LARVA) is used for quantitative detection of Al3+ using complexation in a range from of 2 to 50 ng mL-1 of Al3+. The lightabsorption ratio difference in this range is linear. The limit of detection (3σ) of Al3+ by the LARVA is only 2 ng mL-1. Trace amounts of Al3+ in natural water has been determined with satisfactory results.
Original language | English (US) |
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Pages (from-to) | 24-34 |
Number of pages | 11 |
Journal | Canadian Journal of Analytical Sciences and Spectroscopy |
Volume | 51 |
Issue number | 1 |
State | Published - Dec 1 2006 |
Externally published | Yes |
Keywords
- Aluminum
- Light-absorption ratio variation approach
- Metal complex
- Spectrophotometry
- Trimethoxyphenylfl uorone
ASJC Scopus subject areas
- Analytical Chemistry
- Atomic and Molecular Physics, and Optics
- Spectroscopy