Heo J, Rodrigues M, Saggese S J, Sigel G H
Appl Opt. 1991 Sep 20;30(27):3944-51. doi: 10.1364/AO.30.003944.
An infrared-transmitting chalcogenide fiber was used as an optical probe to analyze qualitatively and quantitatively various chemical substances in aqueous solutions. An unclad fiber with 380-microm diameter was combined with a Fourier transform infrared spectrometer to monitor the concentration of the analytes in solutions by measuring the changes in the absorbance of their fundamental vibration peaks. A linear relationship was observed between the absorption by the vanescent field and concentrations of various analytes. For this study low concentrations of acetone, ethyl alcohol, and sulfuric acid were detected in aqueous solutions. The minimum detection limit for these three chemical substances was 5, 3, and 2 vol. %, respectively, with a sensor length of 15 cm. It was also demonstrated that the same sensor design is capable of monitoring gaseous species such as dichlorodifluoromethane.
一种红外传输硫系光纤被用作光学探头，用于定性和定量分析水溶液中的各种化学物质。一根直径为380微米的裸光纤与傅里叶变换红外光谱仪相结合，通过测量分析物基本振动峰吸光度的变化来监测溶液中分析物的浓度。观察到倏逝场的吸收与各种分析物浓度之间存在线性关系。在本研究中，检测到水溶液中低浓度的丙酮、乙醇和硫酸。这三种化学物质的最低检测限分别为5%、3%和2%（体积分数），传感器长度为15厘米。研究还表明，相同的传感器设计能够监测气态物质，如二氯二氟甲烷。
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