کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1198883 1493532 2015 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Minimizing thermal degradation in gas chromatographic quantitation of pentaerythritol tetranitrate
ترجمه فارسی عنوان
به حداقل رساندن تخریب حرارتی در مقدار کمی کروماتوگرافی گاز از تترانیترات پنتا آرتریتریتول
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• PETN is analyzed successfully using thermal desorption at elevated temperatures.
• Direct liquid deposition on thermal desorption tubes to calibrate PETN quantitation.
• FAPA-HRMS allowed unambiguous identification of molecular PETN from GC separations.

An analytical method for establishing calibration curves for the quantitation of pentaerythriol tetranitrate (PETN) from sorbent-filled thermal desorption tubes by gas chromatography with electron capture detection (TDS-GC-ECD) was developed. As PETN has been demonstrated to thermally degrade under typical GC instrument conditions, peaks corresponding to both PETN degradants and molecular PETN are observed. The retention time corresponding to intact PETN was verified by high-resolution mass spectrometry with a flowing atmospheric pressure afterglow (FAPA) ionization source, which enabled soft ionization of intact PETN eluting the GC and subsequent accurate-mass identification. The GC separation parameters were transferred to a conventional GC-ECD instrument where analytical method-induced PETN degradation was further characterized and minimized. A method calibration curve was established by direct liquid deposition of PETN standard solutions onto the glass frit at the head of sorbent-filled thermal desorption tubes. Two local, linear relationships between detector response and PETN concentration were observed, with a total dynamic range of 0.25–25 ng.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1394, 15 May 2015, Pages 154–158
نویسندگان
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