نوع مقاله : مقاله پژوهشی کامل
نویسنده
بخش شیمی، دانشکده علوم، دانشگاه پیام نور، تهران، ایران
چکیده
در این کار تحقیقاتی، الکترود خمیر کربن اصلاح شده با استفاده از آکریدین اورانژ تثبیت شده بر روی MWCNT و پخش شده در نفیون تهیه شده و رفتار الکتروشیمیایی دوپامین و آسکوربیک اسید در سطح آن با استفاده از روش ولتامتری چرخه‌ای مطالعه شد. نتایج این مطالعه نشان می دهد که، استفاده از مخلوط MWCNT-نفیون باعث تثبیت آکریدین اورانژ در بافت خمیر کربن می شود. به عبارت دیگر، حضور نفیون پایداری آکریدین اورانژ تثبیت شده روی MWCNT را در بافت الکترود افزایش داده و تکرارپذیری سطح الکترود اصلاح شده را بهبود می بخشد. نتایج مطالعات ولتامتری چرخه‌ای و پالس تفاضلی نشان می دهند که الکترود اصلاح شده فعالیت الکتروکاتالیتیکی موثری برای اکسایش الکتروشیمیایی دوپامین و آسکوربیک اسید فراهم می کند و جدایی پیک دو ترکیب حدود 368 میلی ولت به دست می آید. خواص الکتروکاتالیتیکی موثر، جدایی بسیار زیاد بین پیکها و حذف پاسخ ولتامتری سایر ترکیبات کاهنده بیولوژیکی، الکترود اصلاح شده را برای اندازه‌گیری همزمان مقادیر زیر میکرومولار دوپامین و آسکوربیک اسید مناسب نشان می دهد.
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