کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1211213 | 965499 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Extraction of alkyl methylphosphonic acids from aqueous samples using a conventional polymeric solid-phase extraction sorbent and a molecularly imprinted polymer
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The analysis of alkyl methylphosphonic acids (AMPAs) constitutes an important subject for verifying the compliance to the Chemical Weapons Convention (CWC). Indeed, alkyl methylphosphonic acids are the degradation products of V and G nerve agents such as VX, sarin or soman. Lowering the limits of detection of analytical methods for complex aqueous matrices implies the introduction of concentration and clean-up steps in the whole analytical process. Therefore a molecular imprinted polymer (MIP) has been previously developed for the selective extraction and the concentration of the alkyl methylphosphonic acids. Unfortunately, the selective retention process on this MIP has involved the development of hydrogen bonds and so does not allow the direct percolation of aqueous samples. A change of solvent is then necessary and can be performed using solid-phase extraction (SPE) with conventional non selective hydrophobic sorbents. Two polymeric sorbents, Oasis HLB and HR-P resins, were selected for their high specific surface area. The extraction recoveries obtained on both sorbents were compared and the Oasis HLB sorbent was further selected and used for the percolation of acidified aqueous samples. An optimised SPE procedure was then applied to concentrate an aqueous soil extract spiked with isobutyl methylphosphonic acid (iBMPA) and cyclopentyl methylphosphonic acid (cPMPA) that was further cleaned-up by passing through the MIP. The resulting LC-MS full scan chromatograms highlight the clean-up effect of the SPE-MIP association by the removal of the matrix substances and the preservation of 95% of the compounds of interest.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1139, Issue 2, 19 January 2007, Pages 171-177
Journal: Journal of Chromatography A - Volume 1139, Issue 2, 19 January 2007, Pages 171-177
نویسندگان
Sophie Le Moullec, Lina Truong, Cécile Montauban, Arlette Begos, Valérie Pichon, Bruno Bellier,