کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5136048 1493457 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Molecularly imprinted polymer monolith containing magnetic nanoparticles for the stir-bar sorptive extraction of triazines from environmental soil samples
ترجمه فارسی عنوان
مونولیت پلیمری حاوی مولکولی حاوی نانو ذرات مغناطیسی برای استخراج جذبی از تریاازین از نمونه های خاک محیطی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


- A stir-bar based on an imprinted monolith polymer containing magnetic nanoparticles is developed.
- MIP magnetic stir-bar for the stir-bar sorptive extraction of triazines was studied.
- Triazines were successfully extracted from soil sample extracts.

In this work, novel molecularly imprinted stir-bars based upon the entrapment of modified magnetic nanoparticles within an imprinted polymer monolith is developed for stir-bar sorptive extraction (SBSE). Firstly, magnetic nanoparticles were surface modified with oleic acid followed by encapsulation inside a silica network. Then, vinyl-groups were grafted onto the particles surface for the subsequent copolymerization with the imprinting polymerization mixture using a glass vial insert as a mold. As a result, the obtained imprinted monolith presented magnetic properties allowing its use as magnetic stir-bar. Variables affecting both polymer morphology (i.e., amount of magnetic nanoparticles, polymerization time) and binding-elution conditions of target analytes (i.e., solvents, time) was carefully optimized. Optimum imprinted stir-bars were evaluated for the SBSE of triazines in soil sample extracts. Recoveries, at 16 ng g−1 concentration level, ranged from 2.4 to 8.7% with relative standard deviations lower than 15% (n = 3). Although low recoveries were obtained, the high selectivity provided by the new molecularly imprinted stir-bars allowed reaching detection limits below 7.5 ng g−1 by liquid chromatography coupled to UV detection.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1469, 21 October 2016, Pages 1-7
نویسندگان
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