شیمى کاربردى روز

شیمى کاربردى روز

اندازه گیری انتخابی هیدروکربن های آروماتیک چند حلقه ای در آب، پساب، سبزیجات و خاک با استفاده از میکرواستخراج فاز جامد فضای فوقانی بر پایه فیبر MIP/UMCM-1/DES و اندازه گیری با دستگاه GC-FID

نوع مقاله : مقاله علمی پژوهشی

نویسندگان
گروه شیمی، دانشکده علوم، دانشگاه شهید چمران، اهواز، ایران
چکیده
در این مطالعه برای استخراج سریع و کارآمد هیدروکربن‌های آروماتیک چند حلقه‌ای(PAHs) در نمونه های خاک، سبزیجات، آب و فاضلاب از روش میکرواستخراج فاز جامد(SPME) بر اساس فیبر سنتزی چارچوب آلی- فلزی/ حلال‌ یوتکتیک عمیق/ پلیمر قالب مولکولی (MOF-DES/MIPs) استفاده شد. اندازه گیری ترکیبات با استفاده از کروماتوگرافی گازی مجهز به آشکارساز شعله‌ای (GC-FID) انجام شد. بررسی و کنترل مشخصات سطح و کیفیت تخلخل فیبر MOF-DES/MIPs با میکروسکوپ الکترونی روبشی(SEM) و آنالیز سطح (BET) انجام شد. فیبر MOF-DES/MIPs به عنوان یک جاذب با پایداری مکانیکی بالا برای میکرواستخراج PAHs از نمونه‌های حقیقی نتایج بسیار مطلوبی نشان داد. تأثیر پارامترهای کلیدی و تأثیرگذار بر راندمان و دقت استخراج با طراحی آزمایش به روش Box-Behnken بررسی و بهینه‌سازی شد. تحت شرایط بهینه، روش پیشنهادی در محدوده کالیبراسیون 150- 05/0میکروگرم برلیتر خطی بود. حد تشخیص (LOD) و انحراف استاندارد نسبی (RSD, n=5) به ترتیب بین 019/ 0 - 015/ 0 میکروگرم برلیتر و 9/4-0/2 درصد بود. بازیابی‌های بدست آمده از افزایش PAHs به نمونه‌های حقیقی، در محدوده ی 1/106- 3/94 بود که نشان دهنده‌ی صحت خوب فیبر پیشنهادی در نمونه‌های حقیقی آب، سبزیجات و خاک های سطحی مناطق اکتشاف نفت می-باشد. راندمان استخراج بالا، استفاده از اجزای ایمن و ارزان، زمان تجزیه و تحلیل کوتاه و سادگی روش از مزایای دیگر فیبر MOF- DES/MIPs است.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Selective Determination of Polycyclic Aromatic Hydrocarbons in Water, Wastewater, Vegetables and Soil after HS- SPME Using Molecularly Imprinted Polymer / UMCM-1/ Deep Eutectic Solvent Fiber by GC-FID

نویسندگان English

Roya Mirzajani
Marzyeh Dianati
چکیده English

In this study, a solid-phase microextraction (SPME) fiber based on metal-organic frameworks/deep eutectic solvents/molecularly imprinted polymers (MOF-DES/MIPs) was developed for the rapid and efficient extraction of polycyclic aromatic hydrocarbons (PAHs) from soil, vegetables, water, and wastewater samples, followed by gas chromatography-flame ionization detection. The quality and porosity of the MOF-DES/MIPs fiber were evaluated using scanning electron microscopy (SEM) and BET surface area analysis. The effects of key parameters on extraction efficiency and precision were investigated and optimized using a Box-Behnken design. Under optimized conditions, the developed method exhibited linearity over a calibration range of 0.05-150 μg L⁻¹. The detection limits and relative standard deviations (RSD) (n=5) ranged from 0.015 to 0.019 μg L⁻¹ and 2.0% to 4.9%, respectively. Individual PAH recoveries from spiked real samples were between 94.3% and 106.1%. The method's high extraction efficiency, use of safe and inexpensive components, short analysis time, and simplicity suggest it has significant potential for the selective determination of trace PAHs in various real samples, including water, vegetables, and surface soils from oil exploration areas.

کلیدواژه‌ها English

PAHs
Headspace solid- phase microextraction
Metal–organic frameworks
Deep eutectic solvents
Molecularly imprinted polymer
GC-FID
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