نوع مقاله : مقاله پژوهشی کامل
نویسنده
گروه شیمی، دانشکده علوم پایه، دانشگاه آیت ا...بروجردی، بروجرد، ایران
چکیده
یک روش ساده، سبز و حساس به نام ریزاستخراج تشکیل حلال درجا (ISFME) بر اساس استفاده از 1-اکتیل-3-متیل ایمیدازولیوم هگزافلوئوروفسفات [Omim][PF6] به عنوان یک مایع یونی/استخراجکننده سبز (دوستدار محیط زیست) برای تغلیظ و اندازهگیری مقادیر در حد ناچیز یونهای کادمیم (II) به عنوان یک آلاینده خطرناک در چندین نمونه نمکی و حقیقی بکار برده شده است. در این روش، یونهای کادمیم (II) با لیگاندی از نوع بازشیفها به عنوان عامل کمپلکسدهنده، کمپلکس دادهشده و سپس به داخل فاز مایع یونی/(فاز ثانویه) به عنوان استخراجکننده سبز/دوستدار محیط زیست، استخراج میشود. بعد از جداسازی فازها، یون کادمیم (II) تغلیظشده در فاز ثانویه نهایی به کمک دستگاه جذب اتمی شعلهایی اندازهگیری میشود. تأثیر برخی پارامترهای تجزیهایی بررسی و بهینه شده است. در شرایط بهینه، حد تشخیص کمی (LOD)، انحراف استاندارد نسبی (RSD) و فاکتور تغلیظ (EF) روش به ترتیب برابر با µg L-1 05/0، 2/1% و 93 بدست آمد. صحت روش با آنالیز یک ماده استاندارد (مرجع) تأیید شد. بر اساس نتایج بدست آمده، روش ارائه شده میتواند به طور موفقیتآمیز برای اندازهگیری یونهای کادمیم (II) در چندین نمونه نمکی و حقیقی بکار برده شود.
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