کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7611175 1493508 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hollow fiber liquid-liquid-liquid microextraction followed by solid-phase microextraction and in situ derivatization for the determination of chlorophenols by gas chromatography-electron capture detection
ترجمه فارسی عنوان
میکرو اکستراکت مایع با فشرده توخالی و سپس میکروکاکساکتیو فاز جامد و مشتقات آن در محل برای تعیین کلروفنل ها توسط تشخیص کروماتوگرافی گاز الکترون
کلمات کلیدی
میکروساختار جامد فاز، میکرو اکستراکت مایع مایکروویو بر اساس فیبر توخالی، کلروفنل ها، مشتق شده در محل، تجزیه و تحلیل آب،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
A method based on the combination of hollow fiber liquid-liquid-liquid microextraction and solid-phase microextraction (SPME) followed by gas chromatography-electron capture detection was developed for the determination of chlorophenols in water and wastewater samples. Silica microstructures fabricated on the surface of a stainless steel wire were coated by an organic solvent and used as a SPME fiber. The analytes were extracted through a hollow fiber membrane containing n-decane from sample solution to an alkaline aqueous acceptor phase. They were then extracted and in situ derivatized on the SPME fiber using acetic anhydride. Experimental parameters such as the type of extraction solvent, acceptor phase NaOH concentration, donor phase HCl concentration, the amount of derivatizing reagent, salt concentration, stirring rate and extraction time were investigated and optimized. The precision of the method for the analytes at 0.02-30 μg L−1 concentration level ranged from 7.1 to 10.2% (as intra-day relative standard deviation) and 6.4 to 9.8% (as inter-day relative standard deviation). The linear dynamic ranges were in the interval of 5-500 μg L−1, 0.05-5 μg L−1, 0.02-1 μg L−1 and 0.001-0.5 μg L−1 for 2-chlorophenol, 2,4-dichlorophenol, 2,4,6-trichlorophenol and pentachlorophenol, respectively. The enrichment factors were between 432 and 785. The limits of detection were in the range of 0.0004-1.2 μg L−1. Tap water, well water and wastewater samples were also analyzed to evaluate the method capability for real sample analysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1418, 30 October 2015, Pages 45-53
نویسندگان
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