“…However, in some cases, fish were deboned [ 80 ], only the muscle was analysed [ 39 , 42 , 46 , 69 , 78 ] or the different body cavities were analysed separately (fillet, gills, liver, intestine or brain) [ 49 , 53 , 56 , 82 ]. In addition, usually the samples were freeze-dried, so that spraying in the absence of humidity would be easier, although several studies worked with wet weight [ 50 , 79 ]. In case of molluscs, cephalopods or crustaceans were generally pooled without differentiating body cavities, removed from the shell if present, freeze-dried and ground into powder [ 34 , 60 , 68 ].…”