南京大学学报(自然科学版) ›› 2012, Vol. 48 ›› Issue (3): 328335.
潘君屹,丁俊英**,倪培*
Pan Jun一Yi,Ding Jun一Ying , Ni Pei
摘要: 本实验利用显微激光拉曼光谱技术,采用可视融合SiO2毛细管样品,在室温(293 K)下,针对200 cm-1~4000cm-1 光谱区间,原位采集了Na2 CO3一H2O体系水溶液包裹体的拉曼光谱.并且,在分析包裹体特征拉曼光谱基础上,对流体包裹体中的CO32一离子浓度开展定量分析工作.实验结果显示,
水溶液包裹体中CO32-离子具有明显的拉曼特征峰,且其特征峰强度随离子浓度的增加而增强.对CO32-离子的定量分析结果,揭示CO32-离子特征峰的强度参数(I)-CO32-离子特征峰和水O- H伸缩振动特征峰而积比—与CO32-离子浓度(c(CO32-))之间存在函数关系:c ( CO32-)=-1224(I)2+132. 4(I)+0.042;同时,也证实水是盐水体系水溶液包裹体拉曼定量分析的合适内标,其与检测物的拉曼强度比是具有定量分析价值的参数;此外,还反映排除主矿物拉曼信号干扰,准确获取CO32-离子拉
曼特征峰有助于流体包裹体中CO32-离子的精确定量.此次研究结果表明显微激光拉曼光谱技术能够有效应用于水溶液流体包裹体中CO32-离子的定量分析,其不失为流体包裹体成分定量分析的一种实用手段.
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