با همکاری مشترک انجمن علوم و فناوری‌های شیمیایی ایران

نوع مقاله : مقاله پژوهشی کامل

نویسندگان

1 گروه شیمی، دانشکده علوم پایه، دانشگاه زابل، زابل، ایران

2 گروه پژوهشی شیمی، پژوهشکده شیمی و پتروشیمی، پژوهشگاه استاندارد، کرج، ایران

چکیده

دراینجا یک روش ساده، سریع و کارآمد بر پایه میکرواستخراج مایع-مایع همگن یاری­شده با pH ترکیب شده با کروماتوگرافی گازی-طیف­سنجی جرمی (GC-MS) برای تعیین مقادیر ناچیز پلی­کلروبی فنیل­ها شده (PCBs) در نمونه‌های آبی، بکار گرفته شده است. تری اتیل آمین (TEA) بعنوان یک حلال دارای آب­دوستی قابل تغییر استفاده شده که می‌تواند با تغییر pH  محلول نمونه، قابل اختلاط یا غیرقابل اختلاط با نمونه‌های آبی باشد.
در این بررسی، اثرات پارامترهای مختلف در کارایی استخراج PCB ها بررسی شده است. حدود تشخیص، حدود اندازه­گیری کمی و محدوده خطی دینامیکی به ترتیب برابرند با 0.15 و 0.5 و 150-0.5 میکروگرم بر لیتر و همچنین درصد RSD% (n=3) در محدوده‌ی 6.4-5.2 و 7.2-5.6 برای سنجش در یک روز و روزهای مختلف بدست آمد. در نهایت، این روش برای تعیین PCB  ها در نمونه‌های آبی به کار گرفته شد.

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