Aluminum(III)-Selective Screen Printed Sensor Based on Methyl Red


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Modified screen printed electrode (MSPE) with 2-[[4-(dimethyl amino) phenyl] diazenyl] benzoic acid (Methyl Red) was prepared for determination of aluminum ions in water and pharmaceutical (Maalox and Epicogel) samples. The MSPE reveals linear response over a wide concentration range of 5.0 × 10–6–1.0 × 10–2 mol L–1 of aluminum at 25°C with a trivalent cationic slope of 20.4 ± 0.5 mV decade–1 with detection limit 5.0 × 10–6 mol L–1 in pH range 3–5. Moreover, the mechanism of chemical reaction between Methyl Red and aluminum ions on the sensor surface was studied using IR spectra, energy dispersive X-ray analysis (EDX) and scanning electron microscope (SEM). The prepared sensor also showed reproducible and stable response over a period of 14 week with fast response time about 5 s. The proposed potentiometric method was validated according to the IUPAC recommendations. The results obtained from the proposed sensor were comparable with those obtained with inductively coupled plasma mass spectrometry (ICP–MS).

作者简介

Eman Yossri Frag

Chemistry Department, Faculty of Science, Cairo University

编辑信件的主要联系方式.
Email: emanyossri@sci.cu.edu.eg
埃及, Giza, 12613

Marwa Mohamed

Chemistry Department, Faculty of Science, Cairo University

Email: emanyossri@sci.cu.edu.eg
埃及, Giza, 12613

Yasser Samy

Chemistry Department, Faculty of Science, Cairo University

Email: emanyossri@sci.cu.edu.eg
埃及, Giza, 12613

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