نوع مقاله : مقاله پژوهشی کامل
نویسندگان
پژوهشکده چرخه سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، انتهای خیابان کارگر شمالی، صندوق پستی 836-14395 تهران، ایران
چکیده
یک روش استخراج با فاز جامد آنلاین و بدون لیگاند برای پیش تغلیظ سرب پیش از اندازه گیری با روش طیف سنجی نشری اتمی-پلاسمای جفت شده القائی توسعه داده شد. در این روش محلول نمونه از یک فیلتر غشایی سرسرنگی که بر روی آن کربن نیترید گرافیتی نشانده شده است عبور داده شده و یونهای سرب مستقیماً بر روی سطح آن جذب می شوند. سپس یونهای جذب شده بوسیله محلول اسید نیتریک واجذب شده و مستقیماً به داخل مه پاش طیف سنج وارد می شوند. تحت شرایط بهینه و پیش تغلیظ 25 میلی لیتر نمونه، فاکتور تغلیظ 110 و حد تشخیص 0.12 میکروگرم بر لیتر بدست آمدند. این روش برای پیش تغلیظ و اندازه گیری سرب در نمونه های آب زیست محیطی به کار برده شد.
کلیدواژه‌ها
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