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Analytical and Bioanalytical Electrochemistry، جلد ۱۶، شماره ۹، صفحات ۸۸۱-۸۹۱
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عنوان انگلیسی Investigating The Effect of Substitution on The Efficiency of Some Hydrazone Ligands in Using Them as Ionophores in The Construction of Membrane Sensors for Cr3+ Ions
چکیده انگلیسی مقاله Chromium is a metallic element that is used in various industries. Because when chromium is placed in the environment, it is possible to be absorbed by humans and other environmental receptors, which is why the control of this element is very important. Ion-selective electrodes are commonly used today to measure a large number of cations and anions, which do not have some of the problems of the other analytical methods. In this study, to design and build a new chromium ion-selective potentiometric sensor, two ligands (E)-4-amino-N'-(5-bromo-2-hydroxybenzylidene) benzohydrazide (LP5) and (E)-4-amino-N'-(2-hydroxy-3-methoxybenzylidene) benzohydrazide (LP7) was used as ionophores. Then, two ligands used as ionophores were compared in terms of performance and efficiency, and finally the best ionophore was selected for further experiments. The potentiometric responses of electrodes for both ligands were without any changes in the pH range of 2.5 to 10. The electrode with LP5 ligand showed a detection limit of 9.8×10-8 and the LP7 ligand showed a detection limit of 9.5×10-8. As a result, the LP7 ligand indicates a favorable selectivity toward the Cr3+ ion.  The optimal composition of the membrane that led to the desired results was 8% ionophilic, 4% additive, 64% plasticizer, and 24% PVC powder.
کلیدواژه‌های انگلیسی مقاله Ion selective electrodes,PVC-membrane,Chromium (III) ions,Hydrazone ligands,Potentiometric sensor
نویسندگان مقاله Hediye Moblsaz Fard |
Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran

Farhang Mizani |
Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran

Neda Heydari |
Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran

نشانی اینترنتی https://www.abechem.com/article_716175_e86ad5d9a83802a902e94ef690454225.pdf
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