化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (8) : 290-293. DOI: 10.19817/j.cnki.issn 1006-3536.2020.08.063

开发与应用

铜纳米粒子的制备及在食品中H₂O₂残留量的测定

作者信息 +

Preparation of Cu NPs for detection of hydrogen peroxide residues in foods

Dong Zhe¹, Xing Tianhua²

Author information +

文章历史 +

Received
2019-05-06
Issue Date	Revised Date
2020-10-23	2019-05-06

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摘要

H₂O₂作为一种强氧化剂,可使机体的抗氧化能力丧失,进一步引发各种疾病。利用大蒜素的主要提取物S-烯丙基-L-半胱氨酸(SAC)为模板剂合成了铜纳米粒子(SAC-Cu NPs)。在H₂O₂分子存在下,能引起铜纳米粒子荧光强度明显的猝灭。凭借这种特定的响应,开发了基于SAC-Cu NPs的荧光探针,用于高灵敏和高选择性的检测H₂O₂含量的方法,其在0.1×10^-6mol/L到50×10^-6mol/L范围内有着良好的线性响应关系,检测限可达0.79×10^-7mol/L。此外,对实际食品样品中的H₂O₂进行了检测,与国家标准方法的测定值一致,表明该荧光探针在环境保护及保障食品安全方面有较好的应用前景。

Abstract

Hydrogen peroxide (H₂O₂),as a strong oxidant,can make the body lose its antioxidant capacity and further cause various diseases.Copper nanoparticles (SAC-Cu NPs) were synthesized using S-allyl-L-cysteine (SAC) as template.The fluorescence intensity of copper nanoparticles can be obviously quenched by H₂O₂.A fluorescent probe based on SAC-Cu NPs was developed for highly sensitive and selective detection for H₂O₂.It had a good linear response in the range of 0.1×10^-6mol/L to 50×10^-6mol/L with a detection 0.79×10^-7mol/L limit.In addition,the method in consistency with the GB method when employed to detect H₂O₂ in foods,which shown its great potential to effectively protect the environment and ensure food security.

关键词

铜纳米粒子 / S-烯丙基-L-半胱氨酸 / 荧光探针 / H₂O₂ / 检测

Key words

Cu NPs / S-allyl-L-cystein / fluorescent probe / hydrogen peroxide / detection

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铜纳米粒子的制备及在食品中H₂O₂残留量的测定[J]. 化工新型材料, 2020, 48(8): 290-293 DOI:10.19817/j.cnki.issn 1006-3536.2020.08.063

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