摘要
利用微波多元醇法制备了具有大比表面积的铁酸钴纳米团簇,通过透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X-射线衍射仪(XRD)、振动样品磁强计(VSM)等表征手段对其形貌、结构和性能进行了表征和分析,深入研究了其模拟氧化物酶的催化性能,并利用该性能建立了一种简单灵敏且能可视化检测食品添加剂亚硫酸盐的新方法。在最优条件下,该方法对亚硫酸根离子(SO^(2-)_(3))的检测线性范围在10.0~500.0μmol/L之间,检测限为0.8μmol/L,实际食品样品的加标回收率为96.9%~104.7%,能够满足快速简便和可视化检测食品添加剂的实际要求,其有望在食品安全领域得到广泛应用。
Cobalt ferrite nanoclusters(CoFe_(2)O_(4) NCs)with large specific surface area were prepared by microwave-assisted polyol method,which have intrinsic oxidase-like activity.The obtained samples were characterized by transmission electron microscopy(TEM),scanning electron microscope(SEM)and X-ray powder diffraction(XRD)in the morphology and structure,and by vibrating samples magnetometer(VSM)in magnetism.The intrinsic oxidase-like activity of the samples was investigated,and then a colormelric approach to detect sulfite in food was established base on the oxide enzyme catalytic property of CoFe_(2)O_(4) NCs.Under the optimal detection conditions,the concentration of sulfite(SO^(2-)_(3))in the range of 10.0~500.0μmol/L had a good linear relationship with the change of absorbance of the detection system,and the detection limit was 0.8μmol/L.The recovery for food samples was in the range of 96.9%~104.7%.The main advantage of this method could meet the practical requirements of fast,convenient and visual detection of food additives.It is expected to be widely used in the field of food safety.
作者
宋玉哲
左显维
何永成
刘一丹
王焱
何欣
韩根亮
SONG Yu-zhe;ZUO Xian-wei;HE Yong-cheng;LIU Yi-dan;WANG Yan;HE Xin;HAN Gen-liang(Key Laboratory of Sensor and Sensing Technology of Gansu Province,Institute of Sensing Technology,Gansu Academy of Sciences,Lanzhou 730000,China)
出处
《化学试剂》
CAS
北大核心
2022年第10期1468-1474,共7页
Chemical Reagents
基金
国家自然科学基金项目(21864003)
兰州市科技计划项目(2018-1-128)
甘肃省科学院科技产业化项目(2019 CY-11)。
