کاربرد نانوجاذب کربن متخلخل مغناطیسی مشتق شده از پیرولیز r-MIL-88 مغناطیسی در استخراج و اندازه‌گیری هیدروکربن‌های چندحلقه‌ای آروماتیک در نمونه‌های محیط زیستی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری شیمی، گروه شیمی، دانشکدۀ علوم، دانشگاه آزاد اسلامی واحد تبریز، تبریز،‌ ایران

2 دانشیار شیمی تجزیه، گروه شیمی، دانشکدۀ علوم، دانشگاه آزاد اسلامی واحد تبریز، تبریز،‌ ایران

3 استادیار شیمی تجزیه، گروه پژوهشی شیمی و فرایند، پژوهشگاه نیرو، تهران، ایران

4 استاد شیمی تجزیه، گروه شیمی، دانشکدۀ علوم، دانشگاه ارومیه، ارومیه،‌ ایران

5 استادیار شیمی، گروه شیمی، دانشکدۀ علوم، دانشگاه آزاد اسلامی واحد تبریز، تبریز،‌ ایران

10.22034/ijche.2023.378709.1270

چکیده

در پژوهش حاضر، روشی ساده و سریع برای استخراج هم­زمان هیدروکربن­های آروماتیک چندحلقه‌ای (۹،۱۰- دی‌متیل آنتراسن، دی‌بنزوتیوفن) با استفاده از نانوجاذب کربنی مغناطیسی به‌دست آمده از چارچوب فلز- آلی r-MMIL-88 به­طور موفقیت­آمیزی ارائه و به‌کار گرفته شد. در ادامه آنالیت­های تغلیظ‌شده با روش کروماتوگرافی مایع با عملکرد بالا با دتکتور فرابنفش (HPLC-UV) اندازه‌گیری شدند. جاذب سنتزشده با روش‌های مختلف شامل FT-IR, XRD, VSM و TEM شناسایی شد. سپس روش طراحی مختلط مرکزی (CCD) به‌منظور شناسایی و بهینه‌سازی مشخصه‌­های مؤثر بر استخراج ترکیبات ذکرشده استفاده شد. تحت شرایط بهینه، حد تشخیص­ها و محدودۀ خطی منحنی کالیبراسیون به‌ترتیب در محدودۀ 0/1-0/05 و 500-0/25 میگروگرم بر لیتر به‌دست آمد. انحراف استاندارد نسبی روش به‌عنوان معیاری از دقت کمتر از 7/9 درصد برای یک روز کاری و 5/12 درصد برای چند روز کاری به‌دست آمد. درنهایت جاذب مورد نظر به‌منظور استخراج و تعیین مقدار سریع ترکیبات مورد نظر در نمونه­های آب چاه، آب دریای خزر و خلیج فارس استفاده شد. انحراف استاندارد در محدودۀ 10-6-6/7 درصد و درصد بازیابی نسبی در محدودۀ 94-15 درصد به‌دست آمد. نتایج حاصل از آنالیز نمونه­های حقیقی نشان داد که این روش می‌تواند با موفقیت برای استخراج و پیش‌تغلیظ ترکیبات مورد نظر در نمونه‌های با بافت پیچیده استفاده شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Application of Magnetic Porous Carbon Nanosorbent Derived from the Pyrolysis of Magnetic r-MIL-88 for the Extraction and Determination of Polycyclic Aromatic Hydrocarbons in Environmental Samples

نویسندگان [English]

  • N. Heydari 1
  • E. Ghorbani-Kalhor 2
  • A. A. Asgharinezhad 3
  • M. Bahram 4
  • M. T. Vardini 5
1 Ph. D. Student of Chemistry, Department of Chemistry, Tabriz Branch, Islamic Azad University, Tabriz, Iran
2 Associate Professor of Analytical Chemistry, Department of Chemistry, Tabriz Branch, Islamic Azad University, Tabriz, Iran.
3 Assistant Professor of Analytical Chemistry, Chemistry and Process Research Department, Niroo Research Institute (NRI), Tehran, Iran
4 Professor of Analytical Chemistry, Department of Chemistry, Faculty of Science, Urmia University, Urmia, Iran
5 Assistant Professorof Chemistry, Department of Chemistry, Tabriz Branch, Islamic Azad University, Tabriz, Iran
چکیده [English]

In this research, the MPC obtained from the pyrolysis of r-MMIL-88 was applied for preconcentration of two homo and hetero-polycyclic aromatic hydrocarbons. The target analytes were determined by high-performance liquid chromatography with ultra violet detection system (HPLC-UV). Various characterization techniques such as FT-IR spectroscopy, TEM, VSM, and XRD were employed. After that, central composite design (CCD) method was utilized to explore and optimize affecting factors. Applicability of the MPC was explored using dibenzothiophene and 9,10-dimethylanthracene, as the model analytes. Under the optimum condition, LODs and linear ranges were achieved in the domain of 0.05-0.1 µg L-1 and 0.25-500 µg L-1, respectively. Repeatability of the method as RSDs was evaluated which was <7.8% (within-day, n = 5) and <12.5% (between-day, n = 3). Ultimately, the method was applied to analyze well and seawater samples and satisfactory results (RSDs%, 6.7-10.6%; relative recoveries, 94-105%) were obtained. The results of the analysis of real samples showed that this technique can be successfully used to extract and preconcentrate the desired compounds in samples with complex texture.

کلیدواژه‌ها [English]

  • Magnetic Porous Carbon
  • Polycyclic Aromatic Hydrocarbons
  • Preconcentration
  • Metal-Organic Framework
  • Magnetic Solid Phase Extraction
  • Environmental Samples

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مهندسی شیمی ایران
دوره 23، شماره 132
فروردین و اردیبهشت 1403
صفحه 132-148

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