Characterization of Halogenated Organic Compounds in Pelagic Sharks and Sea Turtles Using a Nontargeted Approach

• Main Authors: Aikebaier Renaguli (4846081), Sujan Fernando (1414756), Thomas M. Holsen (394031), Philip K. Hopke (60945), Douglas H. Adams (3616193), George H. Balazs (131599), T. Todd Jones (10799567), Thierry M. Work (131594), Jennifer M. Lynch (5497607), Bernard S. Crimmins (2043484)
• Format: Other Non-Article Part of Journal/Newspaper
• Language: unknown
• Published: 2021
• Subjects: Ecology; Sociology; Marine Biology; Inorganic Chemistry; Infectious Diseases; Virology; Environmental Sciences not elsewhere classified; Biological Sciences not elsewhere classified; Chemical Sciences not elsewhere classified; tris ­( chlorophenyl; shortfin mako collected; lepidochelys olivacea ); lamna nasus )]; flight mass spectrometry; eretmochelys imbricata )]; elemental composition c; diverse structural classes; distinct hoc profiles; complete chemical profiles; 5 – 8; using nontargeted workflows; marine species collected; 3 shortfin mako; sea turtles using; sea turtle livers; halogenated organic compounds; 14 </ sub; sea turtles; shark livers; n </; marine environment; halogenated methoxyphenols; 110 nontargeted; 3 loggerhead; 3 hawksbill; tcpms ); resolution time; polychlorinated biphenyls; pacific ocean; northern gulf; mexico contained; legacy contaminants; largest number; isurus oxyrinchus; highest concentrations; atlantic ocean; ></ sub; >< sub; 12 –<; 1 porbeagle; Pacific; Lamna nasus; Porbeagle
• Online Access: https://doi.org/10.1021/acs.est.1c03798.s002

Halogenated organic compounds (HOCs) in marine species collected from the Atlantic Ocean [3 shortfin mako (Isurus oxyrinchus) and 1 porbeagle (Lamna nasus)], and 12 sea turtles collected from the Pacific Ocean [3 loggerhead (Caretta caretta), 3 green (Chelonia mydas), 3 olive ridley (Lepidochelys olivacea), and 3 hawksbill (Eretmochelys imbricata)] were analyzed with a nontargeted analytical method using two-dimensional gas chromatography coupled to high-resolution time-of-flight mass spectrometry. Sharks and sea turtles had distinct HOC profiles. Halogenated methoxyphenols (halo-MeOPs) were the most abundant compound class identified in sea turtle livers, while polychlorinated biphenyls (PCBs) were the most abundant in shark livers. In addition to legacy contaminants and halo-MeOPs, a total of 110 nontargeted/novel HOCs (NHOCs) were observed in the shark livers. Shortfin mako collected from the northern Gulf of Mexico contained the largest number (89) and most diverse structural classes of NHOCs. Among all NHOCs, a group of compounds with the elemental composition C 14 H 12– n Cl n ( n = 5–8) exhibited the highest concentrations, followed by chlorocarbazoles and tris­(chlorophenyl) methanes (TCPMs). Using nontargeted workflows, a variety of known and unknown HOCs were observed, which demonstrate the need to develop more complete chemical profiles in the marine environment.