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China Surfactant Detergent & Cosmetics ›› 2022, Vol. 52 ›› Issue (6): 683-688.doi: 10.3969/j.issn.1001-1803.2022.06.016
• Analytical methods and testing • Previous Articles
Wei Zengyun*(
)
Received:2021-08-27
Revised:2022-05-31
Online:2022-06-22
Published:2022-06-22
Contact:
Zengyun Wei
E-mail:vzhr@163.com.
CLC Number:
Wei Zengyun. Microwave-assisted preparation of lactic acid carbon quantum dots and determination of p-nitroaniline with fluorescence quenching[J].China Surfactant Detergent & Cosmetics, 2022, 52(6): 683-688.
Fig. 1
TEM image of CDs （a） and distribution graphics of particle size （b）"
Fig. 2
Emission spectra of CDs fluorescence according to excitation wavelengths"
Fig. 3
Fluorescence emission and excitation spectra of the CDs"
Fig. 4
The ultraviolet spectra of CDs prepared by microwave-assisted and heated reflux"
Fig. 5
Effect of pH on fluorescence emission of the CDs"
Fig. 6
Fluorescence spectra of CDs in the presence of different substances"
Fig. 7
Fluorescence spectra of CDs quenched with increasing of p-nitroaniline concentration"
Fig. 8
Analytical curve of p-nitroaniline quenching CDs"
Tab. 1
Determination results of samples and sample recovery"
| 样品 | 样品含量/（mol/L） | 加入量/（mol/L） | 测量值（n=5）/（mol/L） | 回收率（n=5）/% | RSD/% |
|---|---|---|---|---|---|
| 栗棕染发膏 | 1.299×10-5 | 1.25×10-5 | 2.506×10-5 | 96.5 | 1.21 |
| 1.299×10-5 | 2.5×10-5 | 3.895×10-5 | 103.8 | 1.20 | |
| 1.299×10-5 | 5×10-5 | 5.930×10-5 | 92.1 | 1.01 | |
| 枣红染发膏 | 3.742×10-5 | 1×10-5 | 4.681×10-5 | 93.9 | 1.27 |
| 3.742×10-5 | 2×10-5 | 5.826×10-5 | 104.2 | 2.36 | |
| 3.742×10-5 | 4×10-5 | 7.758×10-5 | 100.4 | 1.68 | |
| 亚麻染发膏 | 2.571×10-5 | 5×10-6 | 3.035×10-5 | 92.8 | 2.91 |
| 2.571×10-5 | 1×10-5 | 3.542×10-5 | 97.1 | 1.26 | |
| 2.571×10-5 | 2×10-5 | 4.469×10-5 | 94.9 | 2.68 |
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