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تعیین تری‌کلروفنل ها در نمونه های آب به روش پیش تغلیظ آنلاین بر اساس میکرواستخراج داخل لوله در فضای فوقانی الکتروفورز مویینه | ||
| شیمى کاربردى روز | ||
| دوره 19، شماره 71، تیر 1403، صفحه 167-182 اصل مقاله (980.24 K) | ||
| نوع مقاله: مقاله علمی پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22075/chem.2024.31520.2202 | ||
| نویسنده | ||
| مریم کریمی* | ||
| پژوهشکده فیزیک و شتابگرها، پژوهشگاه علوم و فنون هسته ای، 3486-11365، تهران ـایران | ||
| تاریخ دریافت: 25 مرداد 1402، تاریخ بازنگری: 22 مهر 1402، تاریخ پذیرش: 17 تیر 1403 | ||
| چکیده | ||
| در این مطالعه، از روش ساده و کارآمد پیش‌تغلیظ آنلاین بر اساس میکرواستخراج داخل لوله در فضای فوقانی به منظور استخراج و پیش‌تغلیظ همزمان مقدارهای جزئی شش تری‌کلروفنول در نمونه‌های آبی استفاده شد. آنالیت‌ها پس از استخراج، به‌وسیله دستگاه الکتروفورز مویینه و با استفاده از منحنی درجه‌بندی محلول‌های استاندارد، تعیین مقدار شدند. اثر فاکتورهای مؤثر بر فرآیند استخراج مانند pH فاز دهنده، نوع فاز پذیرنده، دما و زمان استخراج و افزودن حلال آلی به فاز دهنده مورد بررسی قرار گرفته و بهینه شدند. تحت شرایط بهینه، گستره خطی منحنی درجه‌بندی 15 تا 1000 نانومولار با ضریب همبستگی 99/0 و مقدار انحراف استاندارد نسبی با هفت بار تکرار آزمایش و غلظت 500 نانومولار آنالیت‌ها در محدوده 63/7-78/4 بدست آمدند. حد تشخیص روش، 6-5 نانومولار به‌دست آمد. فاکتور پیش‌تغلیظ برای شش تری‌کلروفنول در گستره 310 تا 661 مرتبه بدست آمد. در نهایت، این روش برای پیش تغلیظ و اندازه‌گیری شش تری‌کلروفنول در نمونه‌های آب زیست محیطی به‌کار برده شد. بازیابی نسبی برای نمونه‌های اسپایک‌شده در محدوده %92-82 قرار گرفت که صحت خوب و عدم تأثیر ماتریس نمونه را نشان داد. | ||
| کلیدواژه‌ها | ||
| میکرواستخراج داخل لوله در فضای فوقانی؛ تری‌کلروفنول؛ پیش‌تغلیظ آنلاین؛ الکتروفورز مویینه | ||
| عنوان مقاله [English] | ||
| Determination of trichlorophenols in water samples by online pre-concentration method based on headspace in-tube microextraction-capillary electrophoresis | ||
| نویسندگان [English] | ||
| Maryam Karimi | ||
| Physics and Accelerators Research School, Nuclear Science & Technology Research Institute, P.O.BOX: 11365-3486., Tehran, Iran. | ||
| چکیده [English] | ||
| In this study, a simple and efficient online preconcentration method based on headspace in-tube microextraction was used to simultaneously extract and preconcentrate small amounts of six trichlorophenols in aqueous samples. After extraction, the analytes were quantified by capillary electrophoresis and using the calibration curve of standard solutions. The effect of effective factors on the extraction process such as the pH of the donor phase, the type of the acceptor phase, the temperature and time of extraction, and the addition of organic solvent to the donor phase were investigated and optimized. Under optimal conditions, the linear dynamic range for the proposed technique was 15 to 1000 nM with a correlation coefficient of 0.99, and relative standard deviations were obtained with seven repetitions of the experiment and a concentration of 500 nM of analytes in the range of 4.78-7.63%. The detection limit of the method was 5-6 nM. The preconcentration factor for six trichlorophenols was obtained in the range of 310 to 661 times. Finally, this method was used to preconcentrate and measure six trichlorophenols in environmental water samples. The relative recoveries for the spiked samples were within the 82-92% range, indicating good accuracies and the absence of matrix effects. | ||
| کلیدواژه‌ها [English] | ||
| headspace in-tube microextraction, trichlorophenol, online pre-concentration, capillary electrophoresis | ||
| مراجع | ||
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