Extended Targeted and Non-Targeted Strategies for the Analysis of Marine Toxins in Mussels and Oysters by (LC-HRMS)

Inès Dom (1, 2) , Ronel Biré (1, 2) , Vincent Hort (1, 2) , Gwenaëlle Lavison-Bompard (1, 2) , Marina Nicolas (1, 2) , Thierry Guérin (1, 2)

1 UPE - Université Paris-Est
2 LSAl - Laboratoire de sécurité des aliments de Maisons-Alfort

When considering the geographical expansion of marine toxins, the emergence of new toxins and the associated risk for human health, there is urgent need for versatile and efficient analytical methods that are able to detect a range, as wide as possible, of known or emerging toxins. Current detection methods for marine toxins rely on a priori defined target lists of toxins and are generally inappropriate for the detection and identification of emerging compounds. The authors describe the implementation of a recent approach for the non-targeted analysis of marine toxins in shellfish with a focus on a comprehensive workflow for the acquisition and treatment of the data generated after liquid chromatography coupled with high resolution mass spectrometry (LC-HRMS) analysis. First, the study was carried out in targeted mode to assess the performance of the method for known toxins with an extended range of polarities, including lipophilic toxins (okadaic acid, dinophysistoxins, azaspiracids, pectenotoxins, yessotoxins, cyclic imines, brevetoxins) and domoic acid. The targeted method, assessed for 14 toxins, shows good performance both in mussel and oyster extracts. The non-target potential of the method was then challenged via suspects and without a priori screening by blind analyzing mussel and oyster samples spiked with marine toxins. The data processing was optimized and successfully identified the toxins that were spiked in the blind samples. Key Contribution: (1) Efficient liquid chromatography coupled with high resolution mass spectrometry (LC-HRMS) targeted quantitative method developed and characterized for the analysis of many marine toxins of different polarities, including lipophilic toxins and domoic acid. (2) Optimized strategy for non-targeted analysis of marine toxins, including suspect and without a priori screening. (3) Combination of targeted and non-targeted strategies allowing for good characterization of analyzed shellfish samples.

Keywords: marine toxins; LC-HRMS; targeted analysis; suspects screening; non-targeted analysis; method characterization

Domains: Analytical chemistry; Food engineering

Inès Dom, Ronel Biré, Vincent Hort, Gwenaëlle Lavison-Bompard, Marina Nicolas, et al.. Extended Targeted and Non-Targeted Strategies for the Analysis of Marine Toxins in Mussels and Oysters by (LC-HRMS). Toxins, 2018, 10 (9), pp.375. ⟨10.3390/toxins10090375⟩. ⟨anses-02965474⟩