Identification and quantification of perfluorooctane sulfonamide isomers by liquid chromatography-tandem mass spectrometry. 2019

Guoqiang Shan, and Liping Yang, and Jinyu Zhao, and Ning Liu, and Haochen Cui, and Wenjue Zhong, and Lingyan Zhu
Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China.

Characterization of the isomers perfluorooctane sulfonamide (PFOSA), a key intermediate of the perfluorooctane sulfonate (PFOS) precursors, is a prerequisite to understand the contribution of precursors to PFOS in the environmental and biological matrices. However, the lack of commercial standards makes quantification of the PFOSA isomers in complex matrices a big challenge. For the first time, a liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was established to identify and quantify PFOSA isomers. Improvement on chromatographic separation with selected reaction monitoring allowed full resolution of six monomethyl branched isomers of PFOSA. The isomers were identified and quantified using a series of characteristic fragment ions and the specific product ions of molecular anion m/z 498: m/z 78 (n-), m/z 169 (iso-), m/z 419 (1m-), m/z 164 (2m-), m/z 259 (3m-), m/z 269 (4m-) and m/z 219 (5m-PFOSA). With the aid of 19F nuclear magnetic resonance to define one technical product as standard, the developed method was used to quantify PFOSA isomers in other technical products and spiked fish blood samples. The results indicated that the developed method displayed strong application prospect for measuring trace level of PFOSA isomers in complex samples. The method detection limits for all isomers were in the range of 0.1-1 pg/g ww for blood samples.

UI MeSH Term Description Entries
D007536 Isomerism The phenomenon whereby certain chemical compounds have structures that are different although the compounds possess the same elemental composition. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed) Isomerisms
D001774 Blood Chemical Analysis An examination of chemicals in the blood. Analysis, Blood Chemical,Chemical Analysis, Blood,Analyses, Blood Chemical,Blood Chemical Analyses,Chemical Analyses, Blood
D002853 Chromatography, Liquid Chromatographic techniques in which the mobile phase is a liquid. Liquid Chromatography
D004784 Environmental Monitoring The monitoring of the level of toxins, chemical pollutants, microbial contaminants, or other harmful substances in the environment (soil, air, and water), workplace, or in the bodies of people and animals present in that environment. Monitoring, Environmental,Environmental Surveillance,Surveillance, Environmental
D005399 Fishes A group of cold-blooded, aquatic vertebrates having gills, fins, a cartilaginous or bony endoskeleton, and elongated bodies covered with scales.
D005466 Fluorocarbons Liquid perfluorinated carbon compounds which may or may not contain a hetero atom such as nitrogen, oxygen or sulfur, but do not contain another halogen or hydrogen atom. This concept includes fluorocarbon emulsions, and fluorocarbon blood substitutes. Perfluorinated and related polyfluorinated chemicals are referred to as PFAS and are defined as chemicals with at least two adjacent carbon atoms, where one carbon is fully fluorinated and the other is at least partially fluorinated. Fluorocarbon,Fluorocarbon Emulsion,Fluorocarbon Emulsions,Fluorotelomer Phosphate Esters,N-Alkyl Perfluoroalkyl Sulfonamido Carboxylates,PFAS Per- and Polyfluoroalkyl Substances,PFC Perfluorinated Chemicals,PFECAs Perfluoropolyether Carboxylic Acids,Per- and Polyfluoroalkyl Substances,Perfluoroalkane Sulfonamides,Perfluoroalkyl Carboxylates,Perfluoroalkyl Ether Carboxylates,Perfluoroalkyl Polyether Carboxylates,Perfluorocarbon,Perfluorocarbons,Perfluoropolyether Carboxylic Acids,Polyfluorocarbons,Fluorinated Telomer Alcohols,Fluoro-Telomer Alcohols,Polyfluorinated Telomer Alcohols,Telomer Fluorocarbons,Acids, Perfluoropolyether Carboxylic,Alcohols, Fluorinated Telomer,Alcohols, Fluoro-Telomer,Alcohols, Polyfluorinated Telomer,Carboxylates, Perfluoroalkyl,Carboxylates, Perfluoroalkyl Ether,Carboxylates, Perfluoroalkyl Polyether,Carboxylic Acids, Perfluoropolyether,Chemicals, PFC Perfluorinated,Emulsion, Fluorocarbon,Emulsions, Fluorocarbon,Esters, Fluorotelomer Phosphate,Ether Carboxylates, Perfluoroalkyl,Fluoro Telomer Alcohols,Fluorocarbons, Telomer,N Alkyl Perfluoroalkyl Sulfonamido Carboxylates,PFAS Per and Polyfluoroalkyl Substances,Per and Polyfluoroalkyl Substances,Perfluorinated Chemicals, PFC,Phosphate Esters, Fluorotelomer,Polyether Carboxylates, Perfluoroalkyl,Sulfonamides, Perfluoroalkane,Telomer Alcohols, Fluorinated,Telomer Alcohols, Polyfluorinated
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013449 Sulfonamides A group of compounds that contain the structure SO2NH2. Sulfonamide,Sulfonamide Mixture,Sulfonamide Mixtures,Mixture, Sulfonamide,Mixtures, Sulfonamide
D053719 Tandem Mass Spectrometry A mass spectrometry technique using two (MS/MS) or more mass analyzers. With two in tandem, the precursor ions are mass-selected by a first mass analyzer, and focused into a collision region where they are then fragmented into product ions which are then characterized by a second mass analyzer. A variety of techniques are used to separate the compounds, ionize them, and introduce them to the first mass analyzer. For example, for in GC-MS/MS, GAS CHROMATOGRAPHY-MASS SPECTROMETRY is involved in separating relatively small compounds by GAS CHROMATOGRAPHY prior to injecting them into an ionization chamber for the mass selection. Mass Spectrometry-Mass Spectrometry,Mass Spectrometry Mass Spectrometry,Mass Spectrometry, Tandem
D057230 Limit of Detection Concentration or quantity that is derived from the smallest measure that can be detected with reasonable certainty for a given analytical procedure. Limits of Detection,Detection Limit,Detection Limits

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