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将甲基绿-聚乙烯醇薄膜固定在钾离子(K+)交换玻璃光波导表面,研制出一种光学硫化氢气体传感器.实验结果表明,本传感器对浓度在20×10-9～1.3×10-6范围内的硫化氢气体有良好的线性响应(R=0.9897)和快速响应(t0.9小于3s).本传感器具有灵敏度高、可逆性好、重现性高、成本低,结构简单和易制作等特点.
An optical hydrogen sulfide gas sensor was developed by immobilizing methyl green-PVA film on the surface of potassium ion (K +) exchange glass optical waveguide. The experimental results show that the sensor has the best performance for the concentration of 20 × 10-9 ~ 1.3 × 10 The hydrogen sulfide gas has a good linear response (R = 0.9897) and a fast response (less than 3 seconds) for hydrogen sulfide gas in the range of -6. The sensor has the advantages of high sensitivity, good reversibility, high reproducibility, low cost and simple structure. Easy to make and so on.