Determination of dibenzothiophenes in deep hydrodesulfurized diesel by gas chromatography-triple quadrupole mass spectrometry

An efficient and sensitive analytical method of gas chromatography-triple quadrupole mass spectrometry (GC-QQQ-MS/MS) with the selected reaction monitoring (SRM) for determination of dibenzothiophenes (DBTs) in deep hydrodesulfurized diesel was developed. The standard curves of DBTs were figured out, and the DBSs with alkyl chains of0 to 4 carbon atoms ((C0-C4) DBTs) in deep hydrodesulfurized diesel were analyzed quantitatively. The experimental data showed that the matrix interference during the determination of (C0-C4) DBTs could be effectively eliminated, and the (C0-C4) DBTs in deep hydrodesulfurized diesel could be rapidly and sensitivily determined by this method with the relative standard deviation of less than 10%and the linear correlation coefficients of more than 0.9996 (R2>0.9996). For all (C0-C4) DBTs the detection limit (LOD) and quantitation limit (LOQ) were in the ranges of 0.0006-0.0017 mg/L and 0.002-0.006 mg/L, respectively, and the recoveries were in the range of 98.23%-114.59%. This method is suitable for the determination of DBTs in deep hydrodesulfurized diesel. ©, 2015, Editorial Office of Acta Petrolei Sinica (Petroleum Processing Section). All right reserved.