The use of 4ʹ,4ʺ(5ʺ)-Di-tert-butyldibenzo-18-crown-6(DTB 18C6) as neutral carrier in a Barium Ion Selective Electrode
سال انتشار: 1398
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 356
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شناسه ملی سند علمی:
ICCNRT02_041
تاریخ نمایه سازی: 30 آذر 1398
چکیده مقاله:
A simple, long life, rapid response and sensitive Barium(II)-PVC membrane sensor that typically follows Nernstian behavior has been developed for the assay of barium(II) ions. The developed sensor has been made by incorporating the complex ion associate of barium(II)-DTB 18C6 as an ionophore into a plasticized PVC matrix. The sensor is stable and exhibited fast potential response of 18s and gave a good linear response with a Nernstian slope of 25.23 mV/decade of activity within the concentration range 1*10-1 to 1*10-8M over a wide range of pH 2-12.4 for barium ions. The developed sensor showed comparatively good selectivity for barium ions with respect to other alkali, alkaline earth, transition and heavy metal ions.The plasticizer Dioctyl Phthalate controlled significantly the calibration slope and the lifetime of the fabricated sensor.
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نویسندگان
Sorur Saffari
Department of Chemistry, Payame Noor University, Qazvin, Iran
Farhang Mizani
Department of Chemistry, Payame Noor University, Qazvin, Iran