نوع مقاله : مقاله پژوهشی کامل
نویسندگان
گروه شیمی دریا، دانشکده علوم دریایی، دانشگاه دریانوردی و علوم دریایی، چابهار، ایران
چکیده
در این کار تحقیقاتی یک نانو کامپوزیت گرافن اکسید/ روی اکسید (GO/ZnO) سنتز گردید و برای استخراج فاز جامد در سر سمپلر نالیدیکسیک اسید از نمونه‌های آب دریا و پلاسمای خون انسان و تعیین آن با اسپکتروفتومتری بکار رفت. پارامترهای مؤثر بر روش پیشنهادی، از جمله نوع و حجم حلال شوینده، مقدار جاذب، حجم نمونه، تعداد سیکل‌های استخراج و شویش، pH محلول نمونه، نوع و مقدار نمک بررسی و بهینه سازی شدند. بهینه‌سازی با استفاده از روش‌های یک متغیر در یک زمان و سطح پاسخ انجام گردید. ارقام شایستگی روش به صورت زیر بدست آمد: حدّ تشخیص روش 30/0 میکروگرم بر لیتر، فاکتور پیش‌تغلیظ 40 برای NA، محدودة خطّی منحنی درجه بندی 0/200- 0/1 میکروگرم بر لیتر و با تکرارپذیری (RSD) بهتر از 4/4% حاصل گردید. نتایج کاربرد روش در آب دریا و پلاسما خون انسان نشان داد که این روش تجزیه‌‌ای می‌تواند برای تعیین آنالیت در نمونه‌های واقعی پیچیده به طور موفقیت آمیزی بکار رود.
کلیدواژه‌ها
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