نوع مقاله : مقاله پژوهشی کامل
نویسندگان
1 گروه شیمی، دانشکده علوم پایه، استادیار شیمی تجزیه-دانشگاه آیت ا...بروجردی
2 دانشکده کشاورزی، گروه خاک شناسی، دانشگاه زنجان
3 دانشکده بهداشت، دانشکده علوم پزشکی زنجان، زنجان، ایران
چکیده
در تحقیق حاضر، کاربرد یک مایع یونی عامل دار با نقش ویژه برای استخراج و پیش‌تغلیظ همزمان یون‌های کادمیم و سرب در محیط‌های آبی با استفاده از تکنیک ریز استخراج تشکیل حلال درجا تشریح شده است. مایع یونی عامل دار با عملکرد ویژه 3-(2-(بیس(2-(ترشیو بوتوکسی)-2-اکسو اتیل)آمینو)اتیل)-1-متیل ایمیدازولیوم کلرید ([Tamim][Cl]) به عنوان عامل کمپلکس دهنده برای تشکیل کی‌لیت با یون‌های کادمیم و سرب در فاز آبی استفاده شده است. تعیین مقدار یون‌های فلزی جداسازی و تغلیظ شده بعد از مرحله رقیق‌سازی با استفاده از دستگاه طیف‌سنج شعله‌ایی (FAAS) انجام شد. بمنظور بدست آوردن شرایط استخراجی بهینه، پارامترهای تجزیه‌ایی شامل مقادیر مختلفی از pH محلول نمونه، مقدار عامل کی‌لیت کننده، قدرت یونی محلول، دمای محلول و دز یون مخالف بررسی شدند. علاوه بر این، پارامترهای نشان دهنده ارقام شایستگی روش مانند حد تشخیص (LOD)، انحراف استاندارد نسبی (RSD)، گستره دینامیکی خطی (LDR) و فاکتور تغلیظ (EF) به ترتیب برای کادمیم و سرب برابر با µg L-1 64/0; 76/0، 5/1; 8/%1، µg L-1 2500-50; 200-50 و 85; 80 بدست آمدند. توانایی روش برای آنالیز نمونه‌های آب حقیقی و محلول‌های نمکی بررسی شد و نتایج خوب و رضایتبخشی حاصل شد.
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