A sensitive element was prepared by the spin coating method on the surface of a K⁺ exchange glass optical waveguide by dissolving tetrakis-carboxyphenyl porphyrin (TCPP) in the nontoxic solvent ethanol. The TCPP sensitive element detected 18 volatile organic compounds with an excellent selective response to ethylenediamine (EDA) gas. On this basis, the effects of the solvent, solution mass fraction, speed of the homogenizer and atmospheric humidity on the detection of EDA gas by the sensitive element were discussed. The formation of hydrogen bonds between TCPP and EDA molecules is proposed, which leads to changes in the morphology and light absorbance of the sensing film.

通过将四-羧基苯基卟啉（TCPP）溶解在无毒溶剂乙醇中，通过旋涂法在K ⁺交换玻璃光波导的表面上制备敏感元件。TCPP敏感元件检测到18种挥发性有机化合物，对乙二胺（EDA）气体具有出色的选择性响应。在此基础上，讨论了溶剂，溶液质量分数，均质器速度和大气湿度对敏感元件检测EDA气体的影响。有人提出在TCPP和EDA分子之间形成氢键，这会导致传感膜的形态和吸光度发生变化。