高灵敏度二氧化硫光纤传感器的研究  

Studies on a Fiber Optical Sensor for Sulfur Dioxide with a High Sensitivity

作　　者：许汉英[1,2] 王柯敏[1,2] 王大宁[1,2] 李庆才[1,2] 

机构地区：[1]吉林进出口商品检验局 [2]湖南大学化学化工学院

出　　处：《高等学校化学学报》1998年第9期1401-1404,共4页Chemical Journal of Chinese Universities

基　　金：中华人民共和国进出口商品检验局科研基金

摘　　要：以奎宁为荧光试剂，通过改变传感液膜的组成及采用非稳态测量法，研制成功高灵敏度的二氧化硫光纤传感器，该传感器的线性响应范围为３．１×１０－７～７．８×１０－５ｍｏｌ／Ｌ，检测限达１．６×１０－７ｍｏｌ／Ｌ．研究了内充液中ＮａＨＳＯ３浓度、内充液层厚度对该光纤传感器动态响应信号的影响，用该传感器测定了葡萄酒中游离二氧化硫的含量。The present paper decribes a fiber optical sensor with a high sensitivity to determine sulfur dioxide. In order to improve the sensitivity, a non steady state approach was adopted and the sensor response was recorded after the reaction being proceeded for 1 or 2 min. Effects of NaHSO 3 concentration and thickness of sensing layer of liquid on the sensor response were investigated. A good linearity in a wide concentration range of sulfur dioxide, 3.1×10 -7 ￣7.8×10 -5 mol/L, was displayed. The detection limit was 1.6×10 -7 mol/L . Using the sensor to determine the amounts of SO 2 in the wine, the results were in good agreement with the results obtained by the standard method.

关 键 词：光纤传感器 二氧化硫 测定 葡萄酒 奎宁 

分 类 号：O613.51[理学—无机化学] O657.1[理学—化学]