实验研究不同盐离子对水分子拉曼效应的影响  

Experimental studies on effects of several salt ions on Raman spectra of water

作　　者：陈勇[1] 周瑶琪[1] 查明[1] 王爱国[1] 

机构地区：[1]中国石油大学(华东)地球资源与信息学院,山东东营257061

出　　处：《地球化学》2008年第1期22-26,共5页Geochimica

基　　金：国家高技术研究发展计划(2007AA06Z210);中国石油天然气集团公司创新基金(07E1018);中国石油大学博士基金(y060132)

摘　　要：对流体包裹体中常见的几种盐水溶液进行了拉曼光谱分析。采用了频移参数描述水分子拉曼峰的形变强度,并讨论了频移参数与盐度之间的关系。实验分析结果表明,盐度越大,频移参数越大,水分子拉曼峰形变越大。对频移参数曲线斜率分析显示,盐类对水分子拉曼峰偏移程度影响的强弱顺序为NaCl>Na2SO4>NaHCO3>Na2CO3。讨论了不同阳离子和阴离子对水伸缩振动拉曼峰的影响,结果表明,高价阳离子的影响明显高于低价阳离子;而阴离子对水拉曼峰影响的强弱顺序初步确定为Cl-≈SO42->HCO3->CO32-≈NO3-。Several common salt solutions in fluid inclusions were analyzed parameter was introduced to describe Raman spectroscopy distortion of water relationships between skewing parameter and salinities are also established. parameter and distortion of water molecule variation increase with increasing by Raman spectroscopy. Skewing molecule stretching variation. The The results show that the skewing salinity adding to the solutions. The slopes of the skewing parameter curves display that the salt effects on Raman spectra of water stretching variation can be ranked in the following sequence： NaCl 〉 Na2SO4 〉 NaHCO3 〉 Na2CO3. Effects of some cations and anions on Raman spectra of water are analyzed and discussed. The results indicate that cations with high chemical valence have more remarkable effects on the stretching band of water than those with low valence, and effects of anions are in the following sequence：Cl^-1≈SO4^2-〉HCo3^-〉CO3^2-≈NO3^.

关 键 词：水分子 拉曼光谱 盐离子 

分 类 号：P599[天文地球—地球化学] P578.6[天文地球—地质学]