A novel method with silicon quantum dots (SiQDs)as fluorescence sensor for rapid detection of tetracycline was established. The SiQDs was synthesized by hydrothermal method using N- (β-aminoethyl)-γ-aminopropyl methyl dimethoxy silane as a silicon source and citric acid as reductant. The morphology, structure and luminescence properties were studied by transmission electron microscope (TEM) and spectrum analysis. Since tetracycline can effectively quench the fluorescence of SiQDs, a fluorescence sensor was constructed for tetracycline detection. The results showed that the prepared SiQDs was spherical, had high stability and good water solubility. Moreover, under the optimal experimental conditions, the proposed method had a wide linear range of 0.05-90 μmol/L with a detection limit of 18 nmol/L. It has been successfully applied to the determination of tetracycline in the fresh milk. The recovery rate was between 92.36%-104.07%. The method is simple, sensitive, rapid and suitable for accurate determination of tetracycline in fresh milk.
YANG Cailing
,
ZHAO Xuejun
,
LI Jianying
,
ZHAO Guohu
,
ZHANG Li
,
CAO Wentao
. Rapid determination of tetracycline in fresh milk by silicon quantum dot fluorescence sensor[J]. Food and Fermentation Industries, 2020
, 46(3)
: 264
-268
.
DOI: 10.13995/j.cnki.11-1802/ts.021908
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