Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Department of chemistry, Northeast Normal Univetsity, Changchun 130024, China.
Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Department of chemistry, Northeast Normal Univetsity, Changchun 130024, China.
Food Chem. 2024 May 30;441:138352. doi: 10.1016/j.foodchem.2023.138352. Epub 2024 Jan 5.
Heavy metal ions (HMIs) can lead to serious harm to human health and ecological environment. Thus, developing an efficient detection method for HMIs is extremely necessary. Herein, a new thiacalix[4]arene-based metal-organic framework (MOF) [Co(L1)(TPA)]·DMA·3CHOH·HO (Co-LTPA) (L1 = thiacalix[4]arene-based ligand and HTPA = terephthalic acid) was successfully synthesized. The electrochemical detection platform (Co-LTPA/GCE) was acquired, and Co-LTPA/GCE featured ultrasensitive detection of HMIs with greatly low limits of detection (LODs) of 0.119 nM for Cd and 0.279 nM for Pb as well as wide linear ranges of 0.08-5.8 μM for Cd and 0.01-6.0 μM for Pb. More importantly, the Co-LTPA/GCE sensor was employed to detect foods (milk, honey and orange juice) and water samples (tap water, lake water and drinking water) with satisfactory recoveries, proving the sensor reliability in practical applications. This work provided an example that the functional electrochemical Co-LTPA/GCE sensor was employed for Cd and Pb detection.
重金属离子（HMIs）会对人类健康和生态环境造成严重危害。因此，开发一种高效的 HMIs 检测方法是非常必要的。本文成功合成了一种基于硫代杯[4]芳烃的金属-有机框架（MOF）[Co(L1)(TPA)]·DMA·3CHOH·HO（Co-LTPA）（L1=基于硫代杯[4]芳烃的配体，HTPA=对苯二甲酸）。制备了电化学检测平台（Co-LTPA/GCE），该平台对 HMIs 具有超灵敏的检测性能，Cd 的检测限（LOD）低至 0.119 nM，Pb 的检测限（LOD）低至 0.279 nM，Cd 的线性范围为 0.08-5.8 μM，Pb 的线性范围为 0.01-6.0 μM。更重要的是，该 Co-LTPA/GCE 传感器可用于检测食品（牛奶、蜂蜜和橙汁）和水样（自来水、湖水和饮用水），回收率令人满意，证明了该传感器在实际应用中的可靠性。这项工作为基于功能电化学 Co-LTPA/GCE 传感器用于 Cd 和 Pb 检测提供了一个范例。
