نوع مقاله : مقاله پژوهشی کامل
نویسندگان
1 گروه شیمی، دانشگاه آدیس آبابا، آدیس آبابا، اتیوپی
2 1. گروه شیمی، دانشگاه آدیس آبابا، آدیس آبابا، اتیوپی 2. گروه شیمی، دانشکده علوم طبیعی، دانشگاه جیمما، جیمما، اتیوپی
چکیده
در این مطالعه روش میکرواستخراج فاز مایع با فیبر توخالی برای استخراج انتخابی و پیش تغلیظ علفکشهای تریآزین (آتراتون، دسمترین و آترازین) از نوشابههای تخمیری محلی اتیوپی قبل از جداسازی و تعیین کمی توسط کروماتوگرافی مایع با کارآیی بالا با آشکارساز آرایه دیودی توسعه و گزارش گردید: پارامترهای موثر بر بازدهی استخراج شامل نوع حلال استخراج کننده، حجم و pH محلول نمونه، سرعت هم خوردن، زمان استخراج و غلظت نمک بررسی و شرایط بهینه تعیین گردید. تحت شرایط بهینه، حدود تشخیص و تعیین به ترتیب در محدودههای 0.04-0.02 و 0.12-0.05 میکروگرم بر لیتر بودند. منحنیهای کالیبراسیون در رنج 2- 0.1 میکروگرم بر لیتر با ضرایب همبستگی 0.990 یا بهتر بودند. دقت مطالعات روزانه که به صورت انحراف استاندارد نسبی بیان میشود زیر 8 درصد بود. بازیابیهای نسبی رضایتبخشی برای آنالیتهای مورد نظر بجز آترازین در نوشابههای نچتلا و فیلترتلا بدست آمد. نتایج این تحقیق نشان میدهد که روش پیشنهادی، یک روش موثر برای استخراج و پیش تغلیظ انتخابی باقیماندههای علفکشهای مورد نظر در نوشابههای تخمیری محلی اتیوپی همانند ماتریسهای مشابه با نمونه میباشد.
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