A novel Fiber Bragg grating (FBG) coated with PAni film was used as a sensitive optical sensor for chloroform detection. In this study, the effect of synthesis parameters such as different dopant ratios (Ani: AOT = 5: 3, 5: 5 and 5: 7) and different polymerization temperatures (–5 °C, 0 °C and 25 °C) toward the efficiency of sensors were being investigated. Among the PAnis, PAni 5: 5 (0 °C) possessed the highest conductivity (1.627 × 10⁻² S/cm) and the best efficiency (sensitivity = 0.0015) with response time of 7 s. The mechanism during chloroform detection was studied through Fourier Transform Infrared (FTIR) and Ultraviolet-visible (UV–vis) analysis, and the results showed clearly the physical interaction of the partial negative charge (Cl^δ−) of chloroform with the partial positive charge (NH^δ+) on PAni chain. Besides, the sensor performance such as recyclability, selectivity, limit of detection (LOD), limit of quantitation (LOQ) and real sample analysis was studied in details in this study.

一种新颖的涂覆有PAni膜的光纤布拉格光栅（FBG）被用作敏感的光学传感器，用于氯仿检测。在这项研究中，合成参数的影响朝向不同的掺杂比（Ani：AOT = 5：3、5：5和5：7）和不同的聚合温度（–5°C，0°C和25°C）朝向传感器的效率正在研究中。在PAnis中，PAni 5：5（0°C）具有最高的电导率（1.627×10 ^-2  S / cm）和最佳的效率（灵敏度= 0.0015），响应时间为7 s。通过傅里叶变换红外（FTIR）和紫外可见（UV-vis）分析研究了氯仿检测过程中的机理，结果清楚地表明了部分负电荷（^Clδ-）的氯仿，在PAni链上带有部分正电荷（NHδ ⁺）。此外，本研究还详细研究了传感器性能，例如可回收性，选择性，检测限（LOD），定量限（LOQ）和真实样品分析。