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Journal of Analytical Chemistry

, Volume 65, Issue 6, pp 596–601 | Cite as

Spectrophotometric and thermal lens determination of aluminum with 3-sulfo-5-nitro-4′-diethylamino-2,2′-dihydroxyazobenzene

  • A. A. Zhirkov
  • A. A. Buchinskaya
  • D. B. Petrenko
  • M. A. Proskurnin
  • Yu. M. Dedkov
  • B. K. Zuev
Articles

Abstract

The conditions of the spectrophotometric and thermal lens determination of aluminum with sulfo-5-nitro-4′-diethylamino-2,2′-dihydroxyazobenzene have been compared. The limit of spectrophotometric detection of aluminum in aqueous solutions has been found to be 8 ng/mL. On the basis of the conditions of spectrophotometric determination, the conditions for thermal lens determination have been proposed (532.0 nm, exciting radiation power of 42 mW); they provide a decrease of the detection limit down to 0.6 ng/mL and an increase of the sensitivity coefficient by an order of magnitude. It has been shown that, in the case of the thermal lens determination of aluminum in water-organic mixtures (50 vol % of dimethyl sulfoxide or 30 vol % acetonitrile), the sensitivity coefficient is respectively 9.1 and 6.3-fold higher as compared with the thermal lens determination in water. As a result, the detection limits are reduced 2.5 and 10-fold, respectively. Aluminum has been determined by thermal lens spectrophotometry in Moscow’s tap water using the standard addition method, its concentration being 0.79 ± 0.07 mg/L, which is above the threshold limit value of the aluminum content of drinking water.

Keywords

Tartaric Acid Thermal Lens Sensitivity Coefficient Threshold Limit Value Ascorbic Acid Solution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  • A. A. Zhirkov
    • 1
  • A. A. Buchinskaya
    • 2
  • D. B. Petrenko
    • 3
  • M. A. Proskurnin
    • 2
  • Yu. M. Dedkov
    • 3
  • B. K. Zuev
    • 1
  1. 1.Vernadsky Institute of Geochemistry and Analytical ChemistryRussian Academy of SciencesMoscowRussia
  2. 2.Faculty of ChemistryMoscow State UniversityMoscowRussia
  3. 3.Moscow Regional Pedagogical UniversityMoscowRussia

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