Abstract
In order to provide a method for accurately detecting the concentration and types of heavy metal ions in water, a fluid ion detection system is designed. It consists of a side-polished fiber-assisted fluid structure and a long-period fiber grating (LPFG) coated with a metal chelating agent membrane. In this study, both theoretical and experimental investigations are conducted to examine the sensing characteristics of the system towards copper ion and iron ion solutions. The results demonstrate that under the premise of ensuring solution flow, the system can achieve specific identification of different types of heavy metal ions. Furthermore, it exhibits concentration sensing sensitivities of 9.23×104 mL·nm/mol and 7.13×104 mL·nm/mol for copper sulfate (CuSO4) and ferric chloride (FeCl3) solutions, respectively. Therefore, this sensing system offers the potential for real-time detection of metal ions.
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GUO Junqi is an editorial board member for Optoelectronics Letters and was not involved in the editorial review or the decision to publish this article. All authors declare that there are no competing interests.
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This work has been supported by the National Natural Science Foundation of China (Nos.61705027, 62005033, 11704053 and 52175531), the Basic Research Project of Chongqing Science and Technology Commission (No.CSTC-2020jcyj-msxm0603), and the Science and Technology Research Program of Chongqing Municipal Education Commission (No.KJQN202000609 and KJZD-M202000602).
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Guo, J., Zhou, Y., Zheng, W. et al. Research on a fiber sensing system for metal ion detection based on SPF-PCF-SPF structure and coated LPFG. Optoelectron. Lett. 20, 211–215 (2024). https://doi.org/10.1007/s11801-024-3113-6
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DOI: https://doi.org/10.1007/s11801-024-3113-6