Development of a facile and sensitive analytical tool for the detection of heavy metal ions is still a challenging task because of interference from other chemical species. In this work, glutathione (GSH)-capped Syzygium cumini carbon dots (CDs) have been integrated with agarose hydrogel film and used as an amalgamated solid probe for sensing of different metal ions (Pb2+, Fe3+, and Mn2+). The synthesis of a solid sensing platform is based on the electrostatic interactions between GSH-capped Syzygium cumini CDs and agarose hydrogel. The developed hydrogel-based solid probe exhibited good linearities with the concentration ranges of metal ions from 0.005 to 0.075, 0.0075 to 0.1, and 0.0075 to 0.1 mM with detection limits of 1.3, 2.5, and 2.1 μM for Pb2+, Fe3+, and Mn2+ ions, respectively.

中文翻译：

---

用于重金属离子肉眼检测的谷胱甘肽封端的丁香碳点合并琼脂糖水凝胶膜

由于其他化学物质的干扰，开发用于检测重金属离子的简便而灵敏的分析工具仍然是一项具有挑战性的任务。在这项工作中，谷胱甘肽 (GSH) 封端的孜然碳点 (CD) 已与琼脂糖水凝胶膜集成，并用作复合固体探针，用于感应不同的金属离子（Pb2+、Fe3+ 和 Mn2+）。固体传感平台的合成基于 GSH 加帽的孜然 CDs 和琼脂糖水凝胶之间的静电相互作用。开发的基于水凝胶的固体探针在金属离子浓度范围为 0.005 至 0.075、0.0075 至 0.1 和 0.0075 至 0.1 mM 时表现出良好的线性，Pb2+、Fe3+ 和 Mn 离子的检测限为 1.3、2.5 和 2.1 μM ， 分别。