拉曼光谱检测水中痕量甲基膦酸  

Raman Spectroscopy for Phosphonic Acid Detection in Water

作　　者：王楠[1] 程振兴[1] 张鸿鹏[1] 黄志平[1] 刘广强[2] 蔡伟平[2] 

机构地区：[1]中国人民解放军防化学院,北京102205 [2]中科院固体物理研究所,合肥230031

出　　处：《光散射学报》2016年第1期23-26,共4页The Journal of Light Scattering

摘　　要：基于化学增强理论,选取了银、镍和铁等过渡金属离子与甲基膦酸(MPA)分子进行络合,采用拉曼光谱技术对水相中微量的甲基膦酸进行检测。结果表示,银离子对于水相中甲基膦酸的拉曼增强效果最佳;并且添加银离子后并不影响其定性检测;进一步的条件优化实验表明,随着银离子添加量的增加,增强效果会先增大后减小,当CMPA∶CAg+=1∶1时增强效果达到最佳,检测下限为20pg。For the detection of methyl phosphonic acid （MPA） in water we choose several kinds of transition metal ions （Ag＋ ,Ni2＋ and Fe2＋ ,etc） to chelate with it through the chemi- cal enhancement mechanism. It is found that the Ag＋ as a strong electron donating groups to chelate with MPA leading to the highest enhancements. There was no effect on the qualita- tive detection of MPA when adding Ag＋. The experiments results of optimizations show that along increasing concentration of Ag＋ , MPA Raman spectroscopy intensity firstly increased and then decreased. There was an optimized concentration of Ag＋ when the CMPA ： CA＋ = 1 ： 1. The limit of detection of MPA in water was around 20 pg.

关 键 词：拉曼光谱 化学增强 甲基膦酸 痕量检测 

分 类 号：O657.37[理学—分析化学]