中文摘要：

结合拉曼光谱特异性和微结构光纤所需样品体积小（纳升量级）等优点,基于拉曼光谱法,利用三孔MOF作为传感头,搭建了丙酮浓度传感系统。丙酮溶液在毛细管吸附作用下进入到MOF的空气孔内,在倏逝波激发下丙酮溶液产生拉曼信号,通过探测耦合回微结构光纤纤芯的拉曼信号强度探测丙酮浓度。实验利用丙酮C-H键（2 843cm^-1）伸缩振动峰作为其特征谱线,同时以水的H-O键（3 371cm^-1）伸缩振动峰作为内标物组成相对强度,对溶液中的丙酮含量进行测定。实验结果表明,当丙酮浓度从5%增加到50%时,丙酮浓度与丙酮C-H键伸缩振动峰和水H-O键伸缩振动峰强度比值呈线性关系,二者相关系数为0.98。本文系统也可以用于其它挥发性有机化合物的定性和定量分析。

英文摘要：

A novel approach for identifying acetone using Raman spectroscopy and three-hole microstructure optical fibers（MOFs）is reported.This technique combines the advantages of the specificity of Raman spectroscopy and the small sampling volume of MOF（nano liter）.Acetone solution goes into the air-holes of MOF by capillary effect,the Raman signal is generated by the excitation of evanescence wave in the air-holes and the acetone concentration is detected by measuring the Raman signal intensity coupled back to the core of the MOF.The solvent′s Raman signature is used as an internal calibration standard.The Raman intensity ratio between C-H stretching peak of acetone at 2 843cm-1 and H-O stretching peak at 3 371cm-1 of water is used to detect the concentration of acetone.The experimental results show that when the acetone concentration increases from 5% to 50%,the ratio between C-H stretching peak of acetone and H-O stretching peak of water increases linearly,and their correlation coefficent is 0.98.This system can also be used to analyze other votilate organic compounds qualitatively and quantitatively.