Liu Yajie, Zhu Yao, Liu Xinyu, Dong Liming, Zheng Qinglin, Kang Shu, He Yahui, Wang Jing, Abd El-Aty A M
China-Canada Joint Lab of Food Nutrition and Health (Beijing), Beijing Food Additive Engineering Technology Research Center, School of Food and Health, Beijing Technology &Business University, Beijing, China.
School of Ecology and Environment, Beijing Technology &Business University, Beijing, P.R. China.
J Environ Sci Health B. 2023;58(2):120-130. doi: 10.1080/03601234.2023.2172280. Epub 2023 Feb 3.
The copper ion was detected rapidly by a novel sensing membrane in this paper for its damage to health and the environment. CdSe/ZnS QDs modified polyethersulfone membrane (QDs@PESM) was made by phase-inversion method using a membrane separation technique and quantum dots (QDs). When the sample passed through the membrane, the copper ions in the sample caused the membrane's fluorescence to be quenched. The fluorescence quenching value of the membrane is used to calculate the concentration of copper ions. With = 0.9964, Cucould be quantitatively detected over a wide concentration range (10-1000 μg/L). The method's LOD and LOQ were 4.27 and 14.23 μg/L, respectively. When the CdSe/ZnS QDs@PESM was used to analyze Cu in various real drinks, including well water, baijiu, orange juice, beer, and milk, the recovery ranged from 79.1 to 123.9%, indicating that the CdSe/ZnS QDs@PESM can be used as a rapid, simple and reliable method to determine Cu in various matrices.
本文中，一种新型传感膜可快速检测铜离子，因为其会对健康和环境造成危害。采用膜分离技术和量子点（QDs），通过相转化法制备了CdSe/ZnS量子点修饰的聚醚砜膜（QDs@PESM）。当样品通过该膜时，样品中的铜离子会导致膜的荧光猝灭。利用膜的荧光猝灭值来计算铜离子的浓度。相关系数R为0.9964，在较宽的浓度范围（10 - 1000μg/L）内可对铜进行定量检测。该方法的检测限（LOD）和定量限（LOQ）分别为4.27和14.23μg/L。当使用CdSe/ZnS QDs@PESM分析各种实际饮品（包括井水、白酒、橙汁、啤酒和牛奶）中的铜时，回收率在79.1%至123.9%之间，表明CdSe/ZnS QDs@PESM可作为一种快速、简便且可靠的方法来测定各种基质中的铜。
