title: Stable isotope labeling assisted liquid chromatography-tandem mass spectrometry for the analysis of perfluorinated carboxylic acids in serum samples.
abstract: A new stable isotope labeling (SIL) reagent pair, 10-methyl-acridone-2-sulfonohydrazide (MASH) and its deuterated counterpart d3-MASH was synthesized and successfully applied to the analysis of perfluorinated carboxylic acids (PFCAs) in serum samples. The limits of detection (LODs) were in the range of 0.07-0.42μg/L, and the limits of quantitation (LOQs) were in the range of 0.25-1.38μg/L. Besides ionization enhancing effect, MASH also showed excellent fluorescence property. Therefore, the mass spectrometer operation cost was greatly lowered by carrying out parameter optimization experiments on HPLC which is easier to operate and maintain. The SIL strategy was confirmed to be effective in reducing matrix effect. The developed multiple-reaction monitoring (MRM) condition of PFCAs was also suitable for other carboxylic acid due to the introduction of MASH which is more prone to fragmentation than the analytes. With the MRM conditions obtained from PFCAs, fatty acids were also found in serum samples. This feature made the proposed method show powerful potential in the identification of acidic compounds in complex samples in the absence of corresponding standard.
authors.affiliation: Shandong Province Key Laboratory of Life-Organic Analysis, Qufu Normal University, Qufu, PR China; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University, Qufu, PR China. Electronic address: sjzhang156@163.com.
authors.forename: Shijuan
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining, PR China.
authors.forename: Zhongyin
authors.initials: Z
authors.lastname: Ji
authors.affiliation: Shandong Province Key Laboratory of Life-Organic Analysis, Qufu Normal University, Qufu, PR China; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University, Qufu, PR China.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Sun
authors.affiliation: Shandong Province Key Laboratory of Life-Organic Analysis, Qufu Normal University, Qufu, PR China.
authors.forename: Mingshuang
authors.initials: M
authors.lastname: Li
authors.affiliation: Shandong Province Key Laboratory of Life-Organic Analysis, Qufu Normal University, Qufu, PR China.
authors.forename: Cuncun
authors.initials: C
authors.lastname: Sheng
authors.affiliation: Shandong Province Key Laboratory of Life-Organic Analysis, Qufu Normal University, Qufu, PR China.
authors.forename: Mingbo
authors.initials: M
authors.lastname: Yue
authors.affiliation: Shandong Province Key Laboratory of Life-Organic Analysis, Qufu Normal University, Qufu, PR China.
authors.forename: Yanxin
authors.initials: Y
authors.lastname: Yu
authors.affiliation: Shandong Province Key Laboratory of Life-Organic Analysis, Qufu Normal University, Qufu, PR China; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University, Qufu, PR China.
authors.forename: Guang
authors.initials: G
authors.lastname: Chen
authors.affiliation: Shandong Province Key Laboratory of Life-Organic Analysis, Qufu Normal University, Qufu, PR China; Key Laboratory of Pharmaceutical Intermediates and Analysis of Natural Medicine, Qufu Normal University, Qufu, PR China; Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining, PR China. Electronic address: jmyou6304@163.com.
authors.forename: Jinmao
authors.initials: J
authors.lastname: You
mesh_terms: D054831:Acridones / Q000737:chemistry; D001774:Blood Chemical Analysis / Q000379:methods*; D002264:Carboxylic Acids / Q000097:blood* / Q000737:chemistry*; D002853:Chromatography, Liquid; D054879:Halogenation; D007553:Isotope Labeling; D057230:Limit of Detection; D053719:Tandem Mass Spectrometry
chemical_list: D054831:Acridones; D002264:Carboxylic Acids; C041300:acridone
keywords: Fluorescence; PFCA; Serum; Stable isotope labeling