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近海大氣和海水中揮發(fā)性硫化物的測定
近海大氣和海水中揮發(fā)性硫化物的測定 詳細信息：

名稱：硫化物專用柱

固定相：專用

規(guī)格：3m*3mm

型號：HH一sulfide-III

應用：硫化氫，羰基硫，二硫化碳，噻吩，甲硫醚，甲硫醇，乙硫醇，乙硫醚，二甲er硫等9種硫化物的測定

海洋源的羰基硫(Carbonyl sulfide,COS)、二甲基硫(Dimethylsulfide,DMS)和二硫化碳(Carbon disulfide,CS<,2>)是海洋表層水和大氣中豐富的3種揮發(fā)性硫化物.其中COS在大氣中濃度高,壽命長,能傳輸?shù)狡搅鲗有纬闪蛩猁}氣溶膠,影響大氣輻射平衡和加速平流層O<,3>損耗;DMS是海洋排放的重要的揮發(fā)性硫化物,在大氣氧化后生成的非海鹽硫酸鹽通過直接和間接輻射強迫影響全球氣候;CS<,2>在環(huán)境的濃度較前兩者低,主要環(huán)境效應表現(xiàn)在它是對流層大氣中COS的主要源.這三者在對流層都能被氧化成SO<,2>,終形成硫酸鹽,對區(qū)域算沉降有較大貢獻.近岸海域在全球揮發(fā)性硫化物的排放中占有較大的份額,特別是受到人為因素干擾、富營養(yǎng)化嚴重的區(qū)域.這些區(qū)域所產(chǎn)生的COS、DMS和CS<,2>對全球硫循環(huán)有著重要貢獻.由于三者源匯的復雜性,使得區(qū)域數(shù)據(jù)無法外推全球尺度,精確評估COS、DMS和CS<,2>的環(huán)境效應還需全球各個海域數(shù)據(jù)的支持.論文的主要工作是完善環(huán)境大氣和海洋表層水中COS、DMS和CS<,2>的采樣及測量方法,并以此方法獲得中國近海典型海域大氣和海水中COS、DMS和CS<,2>的濃度水平.討論海洋濃度、大氣濃度和海氣通量的關系.在已有DMS測量工作的基礎上,選擇了同時適合COS、DMS和CS<,2>大氣采樣的預濃縮方式、氧化物去除和除濕裝置,優(yōu)化了GC-FPD測量大氣和海水樣品的色譜條件,達到了完善并整合了同時采集和測量環(huán)境大氣和海水中COS、DMS和CS<,2>的目的


近海大氣和海水中揮發(fā)性硫化物的測定  測試譜圖：





Determination of Volatile Sulfides in Offshore Atmosphere and Seawater
Determination of Volatile Sulfides in Offshore Atmosphere and Seawater Details:


Name: Special column for sulfide

Stationary Phase: Dedicated

Specifications: 3m*3mm

Model: HH-sulfide-III

Application: Determination of 9 kinds of sulfides such as hydrogen sulfide, carbonyl sulfide, carbon disulfide, thiophene, methyl sulfide, methyl mercaptan, ethyl mercaptan, ethyl sulfide, dimethyl sulfide, etc.



Marine-derived carbonyl sulfide (COS), dimethylsulfide (DMS) and carbon disulfide (CS<,2>) are the three most abundant volatile sulfides in ocean surface water and atmosphere. Among them, COS has the highest concentration in the atmosphere and has the longest lifespan. It can be transported to the stratosphere to form sulfate aerosols, affecting the atmospheric radiation balance and accelerating the loss of stratospheric O<,3>; DMS is the most important volatile sulfide emitted by the ocean. , the non-sea salt sulfate formed after atmospheric oxidation affects the global climate through direct and indirect radiative forcing; the concentration of CS<,2> in the environment is lower than the former two, and the main environmental effect is that it is the main source of COS in the tropospheric atmosphere .These three can be oxidized to SO<,2> in the troposphere, and finally form sulfate, which has a great contribution to the regional subsidence. The coastal waters account for a large share of global volatile sulfide emissions, especially It is an area affected by human factors and serious eutrophication. The COS, DMS and CS<,2> produced in these areas have important contributions to the global sulfur cycle. Due to the complexity of the sources and sinks of the three, the regional data cannot be extrapolated To the global scale, accurate assessment of the environmental effects of COS, DMS and CS<,2> requires the support of data from various sea areas around the world. The main work of this paper is to improve the sampling of COS, DMS and CS<,2> in the ambient atmosphere and ocean surface water. and measurement methods, and obtain the concentration levels of COS, DMS and CS<,2> in the atmosphere and seawater in typical coastal waters of China. The relationship between ocean concentration, atmospheric concentration and air-sea flux is discussed. In the existing DMS measurement work On this basis, the preconcentration method, oxide removal and dehumidification device suitable for COS, DMS and CS<,2> atmospheric sampling were selected, and the chromatographic conditions for GC-FPD measurement of atmospheric and seawater samples were optimized, and the perfect and integrated The purpose of simultaneous acquisition and measurement of COS, DMS and CS in ambient atmosphere and seawater<,2>


Determination of Volatile Sulfide Compounds in Offshore Atmosphere and Seawater Test Spectrum: