饮用水中痕量锰的空芯金属包覆波导检测  

Determination of Trace Manganese in Drinking Water

作　　者：冉茂武 佘彦超 李勇 

机构地区：[1]铜仁学院物理与应用工程系,贵州铜仁554300

出　　处：《吉首大学学报（自然科学版）》2017年第5期80-82,87,共4页Journal of Jishou University(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目(61367003;11604246)

摘　　要：结合改进的显色方案,利用空芯金属包覆波导结构,测量饮用水中锰的痕量质量浓度.由于波导超高阶导模的高灵敏度,作为波导导波层的锰溶液消光系数的微小变化可导致反射率极小值的显著改变.而锰溶液消光系数与浓度密切相关(折射率虚部).模拟计算的结果显示该方案的检测分辨率可达到Δκ=1.0×10^(-6).Determination of trace manganese in drinking water through a simple hollow-core metal cladding waveguide （HCMW） structure and a modified chromometry is proposed in this paper. Owing to the high sensitivity of the excited ultrahigh-order modes in the waveguide,a tiny variation of the extinction coefficient of the manganese solution concentration which acts as the guiding layer of the waveguide can lead to a significant change in the depth of refractivity. And the extinction coefficients of the sample is closely related to its concentration. In this way,variation of the manganese solution concentration can be determined by the minimum reflectivity change. Simulation results show that the detection resolution of the extinction coefficient can reach Δκ=1.0×10^-6.

关 键 词：金属包覆波导 痕量 灵敏度 消光系数 

分 类 号：O435.1[机械工程—光学工程]