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Vol. 25 No. 11 (2013): Vol 25 Issue 11

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Determination of Lead(II) in Milk by Flame Atomic Absorption Spectrometry after Solid Phase Extraction

https://doi.org/10.14233/ajchem.2013.14222
Hosna Tohidifar
Department of Food Science and Technology, Varamin Branch, Islamic Azad University, Varamin, Iran
Ali Moghimi
Department of Chemistry, Varamin (Pishva) Branch, Islamic Azad University, Varamin, Iran
Orang Ayvazzadeh
Department of Food Science and Technology, Varamin Branch, Islamic Azad University, Varamin, Iran
Sohil Eskandari
Department of Food Science and Technology, Varamin Branch, Islamic Azad University, Varamin, Iran

Corresponding Author(s) : Ali Moghimi

alimoghimi@iauvaramin.ac.i

Asian Journal of Chemistry, Vol. 25 No. 11 (2013): Vol 25 Issue 11

Abstract

A simple and selective solid phase extraction method for determination of lead in milk and arouses solutions has been reported. The method is based on the adsorption of lead on octadecyl bonded silica cartridges (C18) modified by sodium dodecyl sulfate and 1-(2-pyridylazo)-2-naphthol. The influence of acidity, eluting agents, stability of the column, sample volume and interfering ions has been investigated. The adsorbed complex could be eluted using environmentally benign 5 mL of 1 mol L-1 HNO3 and the concentration of lead(II) was determined by flame atomic absorption spectrometry. A detection limit of 0.050 μg L-1 could be achieved and the developed procedure was successfully applied for the determination of lead(II) in tap water and milk samples. Precision at 1 mg L-1 was 1.44 % (n = 5).

Keywords

Lead(II) Preconcentration Octadecyl bonded silica cartridges 1-(2-Pyridylazo)-2-naphthol
Tohidifar, H., Moghimi, A., Ayvazzadeh, O., & Eskandari, S. (2013). Determination of Lead(II) in Milk by Flame Atomic Absorption Spectrometry after Solid Phase Extraction. Asian Journal of Chemistry, 25(11), 5981–5984. https://doi.org/10.14233/ajchem.2013.14222
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