福瑞姆
双硫腙
镉
检出限
纳米传感器
化学
荧光
核化学
纳米颗粒
分析化学(期刊)
色谱法
纳米技术
材料科学
杀虫剂
有机化学
生物
农学
物理
量子力学
作者
Shuhua Li,Jizhong Wu,Shen Zhang,Tianhui Jiao,Jie Wang,Xiaomei Chen,Qingmin Chen,Quansheng Chen
出处
期刊:Food Chemistry
[Elsevier]
日期:2024-02-01
卷期号:434: 137438-137438
被引量:3
标识
DOI:10.1016/j.foodchem.2023.137438
摘要
Herein, we propose a method for detecting thiram based on the fluorescence inner filter effect using upconversion nanoparticles and dithizone-cadmium complexes (DZ-Cd2+). The ultraviolet absorption of DZ-Cd2+ was in the range of 480-600 nm under alkaline conditions, resulting in fluorescence quenching of the nanoparticles at 540 nm. Thiram had a stronger coordination effect with Cd2+ than dithizone; thus, more thiram-cadmium complex (T-Cd2+) formed when thiram was added, leading to fluorescence recovery at 540 nm. The standard thiram curve was found to have a detection limit of 6.75 ng/mL in the linear range of 0.01-1000 µg/mL. In addition, high-performance liquid chromatography results for detecting thiram in apple samples revealed good application performance. The results demonstrate that the developed method has great potential to detect thiram residues in food.
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