Determination of aluminum ion at ng mL-1 level in natural water using trimethoxyphenylfl uorone by light-absorption ratio variation approach

Jiao Rong Ren, Teng Zeng, Jue Ran Li, Jia Xiang Yang, Hong Wen Gao

Research output: Contribution to journalArticle

4 Scopus citations

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 languageEnglish (US)
Pages (from-to)24-34
Number of pages11
JournalCanadian Journal of Analytical Sciences and Spectroscopy
Volume51
Issue number1
StatePublished - Dec 1 2006
Externally publishedYes

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

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