کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1198658 1493469 2016 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A liquid chromatography–atmospheric pressure photoionization tandem mass spectrometric method for the determination of organosulfur compounds in petroleum asphalt cements
ترجمه فارسی عنوان
یک روش کروماتوگرافی مایع برای اندازه گیری ترکیبات ارگان سولفور در سیمان آسفالت نفتی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


• Determination of organosulfur compounds by UHPLC–MS/MS using APPI without dopant was proposed.
• Virgin and aged petroleum asphalt cements were characterized without matrix pre-treatment steps.
• Ion enhancement and ion suppression from matrix effects in APPI source was investigated.
• Aliphatic sulfides and PAHs were not ionized by krypton lamp in APPI source.
• Brazilian asphalts showed a variation of organosulfur compounds after aging processes.

We present a sensitive liquid chromatography–atmospheric pressure photoionization tandem mass spectrometric (UHPLC-APPI-MS/MS) method for the determination of selected organosulfur compounds in Brazilian asphalt cements. It was possible to detect 14 organosulfur compounds of different classes where sulfoxides and sulfones presented higher sensibility in ionization than thiophenes and aromatic sulfides. A dopant-assisted APPI method was also tested, however, when chromatographic flow rate was optimized a decrease in signal was observed for all compounds. PAHs were tested and ruled out as possible interfering compounds and the matrix effect of asphalt cements was within an acceptable range for the quantification of organosulfur compounds. The proposed method was found to have satisfactory linearity and accuracy with recoveries between 83.85 and 110.28% for thianaphthene and 3-methylbenzothiophene, respectively. Therefore, the method allowed the characterization of organosulfur compounds in Brazilian asphalt cements and demonstrated changes in the amount quantified in asphaltenic and maltenic fractions after the RTFOT + SUNTEST aging process.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1457, 29 July 2016, Pages 29–40
نویسندگان
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