کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1166329 1491099 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analytical evaluation of BEA zeolite for the pre-concentration of polycyclic aromatic hydrocarbons and their subsequent chromatographic analysis in water samples
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Analytical evaluation of BEA zeolite for the pre-concentration of polycyclic aromatic hydrocarbons and their subsequent chromatographic analysis in water samples
چکیده انگلیسی

The analytical performance of BEA – a commercial zeolite – is evaluated for the pre-concentration of fifteen Environmental Protection Agency – polycyclic aromatic hydrocarbons and their subsequent HPLC analysis in tap and lake water samples. The pre-concentration factors obtained with BEA have led to a method with excellent analytical figures of merit. One milliliter aliquots were sufficient to obtain excellent precision of measurements at the parts-per-trillion concentration level with relative standard deviations varying from 4.1% (dibenzo[a,h]anthracene) to 13.4% (pyrene). The limits of detection were excellent as well and varied between 1.1 (anthracene) and 49.9 ng L−1 (indeno[1,2,3-cd]pyrene). The recovery values of all the studied compounds meet the criterion for regulated polycyclic aromatic hydrocarbons, which mandates relative standard deviations equal or lower than 25%. The small volume of organic solvents (100 μL per sample) and amount of BEA (2 mg per sample) makes sample pre-concentration environmentally friendly and cost effective. The extraction procedure is well suited for numerous samples as the small working volume (1 mL) facilitates the implementation of simultaneous sample extraction. These are attractive features when routine monitoring of numerous samples is contemplated.

Figure optionsDownload as PowerPoint slideHighlights
► BEA zeolite is used to pre-concentrate polycyclic aromatic hydrocarbons from water samples.
► The pre-concentration obtained with BEA have led to excellent analytical figures of merit.
► One milliliter aliquots are sufficient to obtain excellent precision at the parts-per-trillion concentration.
► The limits of detection varied between 1.1 (anthracene) and 49.9 ng L−1 (indeno[1,2,3-cd]pyrene).
► The recovery values meet the criterion for regulated polycyclic aromatic hydrocarbons.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 733, 6 July 2012, Pages 103–109
نویسندگان
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