产品名称：	HH一sulfide-III硫专用柱 近海大气和海水中挥发性硫化物的测定
产品型号：	HH一sulfide-III硫专用柱
品牌：	1941
产品数量：
产品单价：	面议
日期:	2022-02-23

HH一sulfide-III硫专用柱 近海大气和海水中挥发性硫化物的测定的详细资料

近海大气和海水中挥发性硫化物的测定
近海大气和海水中挥发性硫化物的测定 详细信息：

名称：硫化物专用柱

固定相：专用

规格：3m*3mm

型号：HH一sulfide-III

应用：硫化氢，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种硫化物的测定

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>)是海洋表层水和大气中丰富的3种挥发性硫化物.其中COS在大气中浓度高,寿命长,能传输到平流层形成硫酸盐气溶胶,影响大气辐射平衡和加速平流层O<,3>损耗;DMS是海洋排放的重要的挥发性硫化物,在大气氧化后生成的非海盐硫酸盐通过直接和间接辐射强迫影响全球气候;CS<,2>在环境的浓度较前两者低,主要环境效应表现在它是对流层大气中COS的主要源.这三者在对流层都能被氧化成SO<,2>,终形成硫酸盐,对区域算沉降有较大贡献.近岸海域在全球挥发性硫化物的排放中占有较大的份额,特别是受到人为因素干扰、富营养化严重的区域.这些区域所产生的COS、DMS和CS<,2>对全球硫循环有着重要贡献.由于三者源汇的复杂性,使得区域数据无法外推全球尺度,精确评估COS、DMS和CS<,2>的环境效应还需全球各个海域数据的支持.论文的主要工作是完善环境大气和海洋表层水中COS、DMS和CS<,2>的采样及测量方法,并以此方法获得中国近海典型海域大气和海水中COS、DMS和CS<,2>的浓度水平.讨论海洋浓度、大气浓度和海气通量的关系.在已有DMS测量工作的基础上,选择了同时适合COS、DMS和CS<,2>大气采样的预浓缩方式、氧化物去除和除湿装置,优化了GC-FPD测量大气和海水样品的色谱条件,达到了完善并整合了同时采集和测量环境大气和海水中COS、DMS和CS<,2>的目的


近海大气和海水中挥发性硫化物的测定  测试谱图：





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: