STATUS QUO OF CONTAMINATION OF PHYCOTOXINS IN DIFFERENT ENVIRONMENTAL MEDIA IN THE TAIWAN STRAIT
Phycotoxins are a group of metabolites produced by marine microalgae and widely distribute in different environmental media,posing potential threat to the health of marine organisms and humans as well as the development of aquaculture.The Taiwan Strait is an important fishery aquaculture area with rich fishery resources and a variety of biological species in China.To further investigate the current pollution status of common phycotoxins in different environmental media in the Taiwan Strait,phytoplankton,seawater,and sediment samples were collected in April 2022,and analyzed by liquid chromatography-tandem mass spectrometry(LC-MS/MS).Results show that domoic acid(DA),okadaic acid(OA)and dinophysistoxin-1(DTX1)were detected in phytoplankton samples with detection rates at 25％,71％,and 100％,on average concentrations of 86.0,9.4,and 50.1 fmol/L,respectively,and were mainly distributed in the northwestern part of the Taiwan Strait.OA and DTX1 were detected in seawater with 100％detection rates and mean concentrations of 34.4 and 165.0 pmol/L,respectively,but DA was not detected.OA and DTX1 were detected in sediment cores at concentrations ranging 0～0.78 and 0.29～2.95 pmol/g in dry weight,respectively,which are higher than those in the sediments collected from most of the other coastal regions of China.Overall,the levels of DA were low in different environmental media in the Taiwan Strait,while OA and DTX1 were at high levels.Therefore,the monitoring at OA and DTX1 should be strengthened in the shellfish aquaculture regions in the Taiwan Strait to protect the seafood safety of shellfish products.
phycotoxinsLC-MS/MSTaiwan Straitenvironmental media
万方数据
维普
