کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1164319 1490988 2014 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Polyelectrolyte coatings prevent interferences from charged nanoparticles in SPME speciation analysis
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Polyelectrolyte coatings prevent interferences from charged nanoparticles in SPME speciation analysis
چکیده انگلیسی


• For the first time SPME fiber is coated with polyelectrolyte layer.
• Sorption of nanoparticles on the solid phase surface is prevented.
• Polyelectrolyte-modified fiber enables extraction of free analyte in presence of sorbing nanoparticles.

In this work we present a new approach for protection of the fiber in solid phase microextraction (SPME) from interfering charged particles present in the sample medium. It involves coating of commercial poly(dimethylsiloxane) extraction phase with polyelectrolyte layer composed of poly(diallyldimethylammonium chloride), and poly(sodium 4-styrenesulfonate). The modified fiber provides reproducible, convenient and fast extraction capabilities toward the model analyte, triclosan (TCS). A negatively charged polyelectrolyte coating prevents sorbing oxidic nanoparticles from both partitioning into the PDMS phase and aggregation at its surface. The results for the TCS/nanoparticle sample show that the polyelectrolyte layer-modified solid phase extracts just the free form of the organic compound and enables dynamic speciation analysis of the nanoparticulate target analyte complex.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 844, 24 September 2014, Pages 44–47
نویسندگان
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