کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5748654 1619143 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Quantification and speciation of volatile fatty acids in the aqueous phase
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Quantification and speciation of volatile fatty acids in the aqueous phase
چکیده انگلیسی


- New technical approach for estimating and specifying VFAs in the aqueous phase.
- High resolution for estimating and specifying VFAs.
- Direct derivatization of VFAs in aqueous phase into FAMEs without pretreatment.

This study lays great emphasis on establishing a reliable analytical platform to quantify and specify volatile fatty acids (VFAs) in the aqueous phase by derivatizing VFAs into their corresponding alkyl esters via thermally-induced rapid esterification (only 10 s reaction time). To this end, reaction conditions for the thermally-induced rapid esterification are optimized. A volumetric ratio of 0.5 at 400 °C for VFA/methanol is identified as the optimal reaction conditions to give ∼90% volatile fatty acid methyl ester (VFAME) yield. To maintain a high yield of VFAMEs, this study suggests that dilution of the sample to an optimum concentration (∼500 ppm for each VFA) is required. Derivatization of VFAs into VFAMEs via the thermally-induced rapid esterification is more reliable to quantify and specify VFAs in the aqueous phase than conventional colorimetric method.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 230, November 2017, Pages 81-86
نویسندگان
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