摘要
以柠檬酸、谷胱甘肽和油胺为原料,采用热解法制备了油溶性荧光碳量子点(o-CDs)。该o-CDs具有良好的光化学性能以及光学稳定性,激发波长与发射波长分别为375和440 nm,量子产率为0.48。基于土霉素对碳量子点的荧光淬灭效应,建立了一种灵敏度高、选择性好的土霉素荧光检测方法,并将该方法应用于实际样品牛奶中土霉素的检测。土霉素对o-CDs的荧光淬灭程度与土霉素的浓度(0.77~16.12μg/mL)呈良好的线性关系,检出限为0.14μg/m L,牛奶样品中的加标回收率在97.13%~104.18%之间,RSD值小于5%,证实了该方法的准确性。该o-CDs有望应用于食品领域中土霉素的检测。
Novel oil-soluble fluorescent carbon quantum dots(o-CDs)are prepared by pyrolysis with citric acid,glutathione and oleamine as raw materials.The o-CDs have good photochemical properties and optical stability.The maximum excitation wavelength and emission wavelengths are located at 375 and 440 nm,respectively,and the fluorescence quantum yield is 0.48.A fluorescence sensor with high sensitivity and selectivity for detection of oxytetracycline is established based on the fluorescence quenching effect.The o-CDs based fluorescence sensor exhibits a good linear relationship between the relative fluorescence intensity and the concentration of oxytetracycline(0.77~16.12μg/mL)with the detection limit of 0.14μg/mL.Furthermore,the sensor has the potential to determine oxytetracycline in milk samples.The spiked recoveries are in the range of 97.13%~104.18%,and the RSD value is less than 5%.The accuracy of the method is verified.The o-CDs is capable of monitoring oxytetracycline in food industry.
作者
张月霞
范小鹏
曹宇娟
杨欣彤
李忠平
杨振华
董川
ZHANG Yue-Xia;FAN Xiao-Peng;CAO Yu-Juan;YANG Xin-Tong;LI Zhong-Ping;YANG Zhen-Hua;DONG Chuan(Institute of Environmental Science,Shanxi University,Taiyuan 030006,China)
出处
《应用化学》
CAS
CSCD
北大核心
2023年第4期509-517,共9页
Chinese Journal of Applied Chemistry
基金
山西省回国留学人员科研项目(Nos.2020-002,2021-014)资助。
关键词
热解法
油溶性碳量子点
土霉素
荧光淬灭
Pyrolysis method
Oil-soluble carbon dots
Oxytetracycline
Fluorescence quenching
