
应用化学 ›› 2023, Vol. 40 ›› Issue (4): 509-517.DOI: 10.19894/j.issn.1000-0518.220340
张月霞, 范小鹏, 曹宇娟, 杨欣彤, 李忠平, 杨振华(), 董川
收稿日期:
2022-10-19
接受日期:
2023-02-20
出版日期:
2023-04-01
发布日期:
2023-04-17
通讯作者:
杨振华
基金资助:
Yue-Xia ZHANG, Xiao-Peng FAN, Yu-Juan CAO, Xin-Tong YANG, Zhong-Ping LI, Zhen-Hua YANG(), Chuan DONG
Received:
2022-10-19
Accepted:
2023-02-20
Published:
2023-04-01
Online:
2023-04-17
Contact:
Zhen-Hua YANG
About author:
yzh429@sxu.edu.cnSupported by:
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(0.77~16.12 μg/mL)呈良好的线性关系,检出限为0.14 μg/mL,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。
中图分类号:
张月霞, 范小鹏, 曹宇娟, 杨欣彤, 李忠平, 杨振华, 董川. 热解法制备油溶性碳量子点用于土霉素的检测[J]. 应用化学, 2023, 40(4): 509-517.
Yue-Xia ZHANG, Xiao-Peng FAN, Yu-Juan CAO, Xin-Tong YANG, Zhong-Ping LI, Zhen-Hua YANG, Chuan DONG. Synthesis of Oil-soluble Carbon Quantum Dots by Pyrolysis Method for the Detection of Oxytetracycline[J]. Chinese Journal of Applied Chemistry, 2023, 40(4): 509-517.
图2 o-CDs合成条件的优化
Fig.2 Optimization of synthesis conditions of o-CDsNote: A. GSH amount; B. oleylamine dosage; C. reaction temperature;D. reaction time of GSH and CA; E. reaction time of oleylamine on the fluorescence intensity of o-CDs
图6 (A) o-CDs的UV-Vis图、激发波长光谱图和发射波长光谱图; (B) 不同激发波长下o-CDs的荧光光谱
Fig.6 (A) UV-Vis, excitation wavelengths and emission wavelength spectra of o-CDs; (B) Fluorescence emissionspectra of o-CDs with different excitation wavelengths
图7 (A) 不同抗生素对o-CDs荧光强度的影响;(B) pH值对o-CDs传感器荧光强度的影响;(C) OTC检测反应时间对o-CDs荧光强度的影响
Fig.7 (A) The effect of different antibiotics on fluorescence intensity of o-CDs; (B) The influence of pH on fluorescence intensity of o-CDs sensors; (C) The effect of reaction time of OTC on fluorescence intensity of o-CDs
图8 (A) o-CDs检测OTC的荧光光谱图;(B) OTC浓度对荧光强度影响的线性图;(C) o-CDs的荧光寿命拟合图
Fig.8 (A) Fluorescence spectra of o-CDs sensor for the detection of OTC; (B) The plot of theratios of (F0-F)/F0 versus the concentration of OTC; (C) Fitting diagram of fluorescence lifetime of o-CDs sensor
Samples | Added/(μg·mL-1) | Found/(μg·mL-1) | Recovery/% | RSD/% |
---|---|---|---|---|
1 | 3.83 | 3.99 | 104.18 | 3.74 |
2 | 7.67 | 7.45 | 97.13 | 2.51 |
3 | 11.50 | 11.22 | 97.57 | 2.83 |
表1 加标回收法测定牛奶中的OTC
Table 1 Determination of OTC in milk by standard addition recovery method
Samples | Added/(μg·mL-1) | Found/(μg·mL-1) | Recovery/% | RSD/% |
---|---|---|---|---|
1 | 3.83 | 3.99 | 104.18 | 3.74 |
2 | 7.67 | 7.45 | 97.13 | 2.51 |
3 | 11.50 | 11.22 | 97.57 | 2.83 |
Method | Linear range | LOD | Ref. |
---|---|---|---|
HPLC | 0.32~1000 μg/mL | 6.07 μg/mL | [ |
SERS | 0.2~22 μg/mL | 0.2 μg/mL | [ |
SPE and AuNPs coated capillary electrophoresis | 10~200 μg/mL | 0.22 μg/mL | [ |
Electrochemical sensor, Biosensor | 0.46~46.04 μg/mL | 0.15 μg/mL | [ |
Up conversion luminescent nanomaterials | 0.05~100 ng/mL | 0.04 ng/mL | [ |
1~10 μg/mL | 0.16 μg/mL | [ | |
Fluorescence sensor | 0.77~16.12 μg/mL | 0.14 μg/mL | This work |
表2 不同OTC检测方法对比
Table 2 Comparison of different methods for the detection of OTC
Method | Linear range | LOD | Ref. |
---|---|---|---|
HPLC | 0.32~1000 μg/mL | 6.07 μg/mL | [ |
SERS | 0.2~22 μg/mL | 0.2 μg/mL | [ |
SPE and AuNPs coated capillary electrophoresis | 10~200 μg/mL | 0.22 μg/mL | [ |
Electrochemical sensor, Biosensor | 0.46~46.04 μg/mL | 0.15 μg/mL | [ |
Up conversion luminescent nanomaterials | 0.05~100 ng/mL | 0.04 ng/mL | [ |
1~10 μg/mL | 0.16 μg/mL | [ | |
Fluorescence sensor | 0.77~16.12 μg/mL | 0.14 μg/mL | This work |
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