Fabrication of a coated graphite electrode for selective determination of magnesium
محل انتشار: بیستمین کنفرانس شیمی فیزیک ایران (IPCC۲۰)
سال انتشار: 1396
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 354
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استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
ISPTC20_257
تاریخ نمایه سازی: 2 تیر 1397
چکیده مقاله:
In this project a mangnesium selective coated graphite electrode based on dibenzo-18-crown-6 as a neutral ionophore icorporated in polyvinyl choloride (PVC) membrane in tetrahydrofuran (THF) has been fabricated. The best operation obtained in the membrane including: 4.0 mg dibenzo-18-crown-6, 1.0 mg sodium tetraphenylborate (NaTPB), 65.0 mg dioctylphthalate (DOP) and 30.0 mg PVC. This electrode had a good selectivity respect to Mg2+ cation, with a nernstian slope of 29.1±0.7 mV.decade-1 in a linear concentration range of 1.0×10-1 M-1.0×10-5 M. The detection limit of the electrode was 8.9×10-6 M. The porposed sensor had a fast response time of 10 sec and good reproducibility. The effects of the pH and possible interfering ions were investigated, and it could be used in pH range of 3-12.
کلیدواژه ها:
نویسندگان
F Davudi
Department of Chemistry, khouzestan Science and Research Branch, Islamic Azad University, Ahvaz, Iran- Department of chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
A Ghaemi
Department of chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
M Rezaeimanesh
Department of Chemistry, khouzestan Science and Research Branch, Islamic Azad University, Ahvaz, Iran- Department of chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran