Simple and rapid detection of free 3-monochloropropane-1,2-diol based on cysteine modified silver nanoparticles
文献类型： 外文期刊
作者： Martin, Aka Alla 1 ; Fodjo, Essy Kouadio 2 ; Marc, Gouli Bi Irie 2 ; Albert, Trokourey 2 ; Kong, Cong 1 ;
作者机构： 1.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Minist Agr & Rural Affairs, Key Lab East China Sea Fishery Resources Exploita, Shanghai 200090, Peoples R China
2.Univ Felix Houphouet Boigny, UFR SSMT, Phys Chem Lab, 22 BP 582, Abidjan 22, Cote Ivoire
3.Acad Forens Sci, Shanghai Key Lab Forens Med, Shanghai 200063, Peoples R China
关键词： 3-Monochloropropane-1,2-diol; Colorimetric detection; Cys-AgNPs; Smoked fish; Unassisted visual detection
期刊名称：FOOD CHEMISTRY （ 影响因子：7.514； 五年影响因子：7.516 ）
ISSN： 0308-8146
年卷期： 2021 年 338 卷
页码：
收录情况： SCI
摘要： A rapid colorimetric method using cysteine-modified silver nanoparticles (Cys-AgNPs) is applied for the detection of 3-monochloropropane-1,2-diol (3-MCPD). Indeed, in the presence of 3-MCPD, the color of Cys-AgNPs solution changes from yellow to pink within five minutes at 100 degrees C and pH 9.3. This change is mainly attributed to the ability of amino group of cysteine to react with 3-MCPD to form N-(2,3-dihydroxypropyl)-amino acid grafted on AgNPs (3-MCPD-Cys-AgNPs) in alkaline medium. This color change makes 3-MCPD to be clearly detectable by unassisted visual means even at 0.1 mu g.mL(-1). Besides, using UV-Vis spectroscopic technique, a linear range from 0.1 mu g.mL(-1) to 1.25 mu g.mL(-1) for 3-MCPD detection is obtained, with a calculated detection limit of 0.084 mu g.mL(-1). These results suggest that this sensing technique is sensitive to 3-MCPD and may have a substantial application in the rapid detection of food contaminants particularly, where quality and safety of food products are paramount concern.
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