YOU Qian,Fujii Manabu,FU Qing-long.Chemodiversity of Dissolved Organic Matter in Seawater of Tokyo Bay Affected by Sunlight Irradiation[J].Journal of Instrumental Analysis,2025,44(05):774-780.
YOU Qian,Fujii Manabu,FU Qing-long.Chemodiversity of Dissolved Organic Matter in Seawater of Tokyo Bay Affected by Sunlight Irradiation[J].Journal of Instrumental Analysis,2025,44(05):774-780. DOI: 10.12452/j.fxcsxb.240826345.
Chemodiversity of Dissolved Organic Matter in Seawater of Tokyo Bay Affected by Sunlight Irradiation
The effect of natural sunlight irradiation on the chemodiversity of coastal seawater dissolved organic matter in the coastal seawater of Tokyo Bay was investigated by Fourier transform-ion cyclotron resonance mass spectrometry(FT-ICR MS). Results of this study revealed that the CHO,CHOS,and CHON compounds with low aromatics were dominant in the coastal seawater dissolved organic matter(DOM) of Tokyo Bay,Japan. After natural sunlight irradiation,the number of tannins-like and N-free saturated compounds increased by 60% and 62%,respectively. In addition,the intensity of the normalized ion peaks(the intensity of the ion peak was normalized by the concentration of organic carbon) of 2 347 lignin-like and 616 saturated compounds decreased by the natural sunlit irradiation;while the intensity of normalized ion peaks of 2 211 lignin-like,975 saturated compounds,493 tannins-like,and 289 aminosugars increased by the natural sunlight irradiation. The results of this study will deepen the understanding of chemodiversity in coastal seawater DOM and provide valuable insights for the photochemical and environmental effects of aquatic DOM.
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