检出限
吸附
环糊精
电化学气体传感器
甲基对硫磷
化学
碳纤维
多孔性
核化学
电化学
化学工程
材料科学
色谱法
电极
有机化学
杀虫剂
复合数
复合材料
物理化学
生物
工程类
农学
作者
Fang Li,Runqiang Liu,Volodymyr Dubovyk,Qiwen Ran,Hongyuan Zhao,Sridhar Komarneni
出处
期刊:Food Chemistry
[Elsevier]
日期:2022-08-01
卷期号:384: 132643-132643
被引量:27
标识
DOI:10.1016/j.foodchem.2022.132643
摘要
Porous carbon spheres (PCS) derived from expired sugarcane juice (SJ) and modified with β-cyclodextrin (β-CD) were used for the fabrication of SJPCS@β-CD/GCE sensor with glassy carbon electrode (GCE) to detect methyl parathion (MP). SJPCS with interconnected porous structure exhibits excellent electrical conductivity, strong adsorption property, and high specific surface area, while β-CD with molecular recognition property achieves the uniform dispersion of SJPCS and promotes the recognition and adsorption of MP molecules. Thanks to the synergistic combination of SJPCS and β-CD, the SJPCS@β-CD/GCE sensor exhibited respectable MP determination performance with low limit of detection of 5.87 nM in the MP concentration range of 0.01-10 µM. For the MP detection in vegetables (onion, cabbage, spinach), the fabricated sensor showed good practicability with adequate relative standard deviation of 1.06% to 4.25% and satisfactory recoveries of 96.5 to 100.5%. A promising strategy for the rapid determination of methyl parathion in food products was developed.
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