摘要
A method is described for determining dimethylI sulfide （DMS） in seawater. DMS was first extractedfrom the seawater using organic reagent, then reverse-extracted by 5% HgCl2. In the laboratory DMS wasreleased by concentrated HCI and finally measured by GC-FPD. The limit of detection me O.05 ng ofS. Measurements of DMS along surface transects and on wtital profibe across the EaSt China Sca （Ers）continental sheif showed tha itS conodIations of S in the surface seawater ranged from 64-180 ng/L andthat itS vertical djstribuion was divided into 3 trpes. Model talculations of a stagnant film show a DMSflux of 10.6 umol/m<sub>2</sub>d the air-sea inteIha.
A method is described for determining dimethyl sulfide (DMS) in seawater. DMS was fust extracted from the seawater using organic reagent, then reverse-extracted by 5% HgCl2. In the laboratory, DMS was released by concentrated HCl and finally measured by GC-FPD. The limit of detection was 0.05 ng of S. Measurements of DMS along surface transects and on vertical profiles across the East China Sea (ECS) continental shelf showed that its concentrations of S in the surface seawater ranged from 64-180 ng/L and that its vertical distribution was divided into 3 types. Model calculations of a stagnant film show a DMS flux of 10.6 μmol/m2d across the air-sea interface.
基金
Project supported by the National Natural Science Key Fund (No.49136131)
