紫胶基CQDs用于检测盐酸四环素

doi:10.3969/j.issn.0253-2417.2022.04.012

Abstract

Abstract:

Using bleached shellac as raw material, water soluble shellac-based carbon quantum dots(shellac-CQDs) with blue fluorescence were synthesized by hydrothermal and one-step synthesis method. Their composition and structure were characterized by Fourier transform infrared spectroscopy(FT-IR), X-ray photoelectron spectroscopy(XPS), transmission electron microscopy(TEM) and dynamic light scattering(DLS). The analysis results showed that shellac-CQDs mainly contained C and O elements, which were composed of aromatic ring structure and a large number of oxygen-containing functional groups, with an average particle size of 2.0 nm. The spectral tests showed that the maximum excitation wavelength and emission wavelength of shellac-CQDs were 320 and 432 nm, respectively. The maximum absorption wavelength in the UV-Vis spectrum was 289 nm. Based on the good fluorescence properties of shellac-CQDs and the quenching effect of tetracycline hydrochloride on its fluorescence, a new method for the detection of tetracycline hydrochloride using shellac-CQDs as fluorescence sensor was established. The results showed that there was a good linear relationship between the fluorescence peak areas and the concentration of tetracycline hydrochloride in the range of 0.02-0.10 g/L. The detection limit of this method was 0.01 g/L. It has been preliminarily applied to the detection of tetracycline hydrochloride in tap water or feed, and the recovery rate of the samples was 96.9%-107.7%, and the relative standard deviation(RSD) was between 1.9% and 5.5%, indicating that this method has high accuracy, good repeatability and potential practical application value.

Key words: bleached shellac, carbon quantum dots, detection, tetracycline hydrochloride

CLC Number:

TQ35

Hongyan XU, Jinzhi YE, Qi ZHANG, Jiajia LIU, Lanxiang LIU. Shellac-based CQDs were Used to Detect Tetracycline Hydrochloride[J]. Chemistry and Industry of Forest Products, 2022, 42(4): 81-87.

Figures/Tables 8

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References 25

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样品¹⁾ sample	理论值/(g·L^-1) theoretical value	检测值/(g·L^-1) test value	回收率/% recovery rate	RSD/%
A1	0.035 0	0.037 7	107.7	4.1
A2	0.045 0	0.045 5	101.1	2.6
A3	0.070 0	0.068 8	98.3	5.2
B1	0.035 0	0.037 5	107.1	1.9
B2	0.045 0	0.044 6	99.1	3.8
B3	0.070 0	0.069 6	99.4	4.3
C1	0.035 0	0.037 3	106.6	5.5
C2	0.045 0	0.043 6	96.9	3.9
C3	0.070 0	0.071 0	101.4	3.1

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Shellac-based CQDs were Used to Detect Tetracycline Hydrochloride

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