A liquid chromatography-atmospheric pressure photoionization tandem mass spectrometric method for the determination of organosulfur compounds in petroleum asphalt cements

被引：23
|
作者：
da Silveira, Gessica Domingos [1 ,2 ]
Faccin, Henrique [1 ,2 ]
Claussen, Luis [1 ,2 ]
Goularte, Rayane Bueno [1 ,2 ]
Do Nascimento, Paulo C. [1 ,2 ]
Bohrer, Denise [1 ,2 ]
Cravo, Margareth [3 ]
Leite, Leni F. M. [3 ]
de Carvalho, Leandro Machado [1 ,2 ]
机构：
[1] Fed Univ Santa Maria UFSM, Dept Chem, POB 5051, BR-97105970 Santa Maria, RS, Brazil
[2] Fed Univ Santa Maria UFSM, Grad Program Chem, Santa Maria, RS, Brazil
[3] Petrobras SA, Ctr Pesquisa & Desenvolvimento Leopoldo Americo M, Rio De Janeiro, RJ, Brazil
来源：
JOURNAL OF CHROMATOGRAPHY A | 2016年 / 1457卷
关键词：
Asphalt cements; Aging asphalt; UHPLC-APPI-MS/MS; Matrix effect; Organosulfur compounds; POLYCYCLIC AROMATIC-HYDROCARBONS; ELECTROSPRAY-IONIZATION; SULFUR-COMPOUNDS; CRUDE-OIL; SPECIATION; HETEROCYCLES; RESIDUES; APPI; GAS; MS;
D O I：
10.1016/j.chroma.2016.06.003
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
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. (C) 2016 Elsevier B.V. All rights reserved.
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页码：29 / 40
页数：12
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