کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5134276 1492213 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A potential method for comparing instrumental analysis of volatile organic compounds using standards calibrated for the gas phase
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
A potential method for comparing instrumental analysis of volatile organic compounds using standards calibrated for the gas phase
چکیده انگلیسی


- The performance of the instruments was assessed in the analysis of volatiles.
- Rate coefficients were calculated via Su and Chesnavich trajectory theory.
- Estimation of concentration is sensitive to changes in the reduced electric field.

In this paper we report a method for the comparative analysis of volatile organic compounds (VOCs) at physiologically representative concentrations by different analytical methods Standard aqueous solutions of acetone, ethanol, methanol, 1-propanol, 2-propanol and acetaldehyde were prepared by adding a specific mass of compound to a known volume of water, calculated using published Henry's law constants for individual compounds. Headspace concentrations are thus known from established partitioning from dilute aqueous phase in accordance with Henry's law. Selected Ion Flow Tube Mass Spectrometry (SIFT-MS), Proton Transfer Reaction Mass Spectrometry (PTR-MS), and Gas Chromatography-Mass Spectrometry (GC-MS) coupled to thermal desorption have been used to study and evaluate the performance of the instruments in the analysis of these VOCs. These analytical techniques have been widely used in the identification and quantification of trace concentrations of VOCs in biological samples. Quantitative determination of VOC concentration was achieved and the performance of the instruments compared with one another. Calibration curves are given within the range 101-103 ppbv.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Mass Spectrometry - Volume 419, August 2017, Pages 1-10
نویسندگان
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