نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه زیست شناسی، واحد مشهد، دانشگاه آزاد اسلامی، مشهد، ایران
2 گروه زیست فناوری پزشکی، دانشکده پزشکی، دانشگاه علوم پزشکی مشهد، مشهد، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background: One of the significant health problems in some developing countries such as Iran is lead toxicity. The present study describes the fabrication of a novel ion selective electrode for the rapid and sensitive determination of Pb (II) ions in real samples.
Methods: The electrode was prepared by Glassy carbon electrode modification with Calyx[6]arena as an ionophore. A mixture of DMPP, HEMA and n-BA were used to to prepare the first layer as well as NaTFPB, Calyx[6]arena and DMPP were used to to prepare the second layer.
Results: The results obtained from FT-IR, FESEM, and EDX confirm the presence of Pb (II) ions in the optimized sensor. Ion selective electrode exhibits nernstian response to Pb (II) ions with slope of 28.58 mV/decade in the concentration range of 1 × 10-8 to 1 × 10-2 M. Moreover, the electrode showed good selectivity toward Pb(II) ions over KCL, NaCL, NH4CL, CaCL2, MgCL2, ZnCL2, CuCL2 and NiCL2. In relation to the real sample, the prepared electrode showed a recovery between 94.39_99.48 % and a relative standard deviation of less than 1 %.
Conclusion: The designed electrode, without the need for complicated sample preparation steps, was successfully used to determine the low concentrations of Pb(II) cation in the blood samples.
As a result, the designed electrode is of good accuracy and can be used to measure Pb(II) cation in blood samples and possibly any other biological sample.
کلیدواژهها [English]