Citation: YAO Jian-Mei, DONG Mei-Yu, ZHANG Ling-Xue, HE Jing, LI Tao, WEI Gang, DONG Nan. Determination of Estrogens in Foods by Derived Cucurbituril-Coated Stir Bar Sorptive Extraction Combined with High-Performance Liquid Chromatography[J]. Chinese Journal of Analytical Chemistry, ;2019, 47(3): 463-470. doi: 10.19756/j.issn.0253-3820.181486 shu

Determination of Estrogens in Foods by Derived Cucurbituril-Coated Stir Bar Sorptive Extraction Combined with High-Performance Liquid Chromatography

YAO Jian-Mei ^1, ,
DONG Mei-Yu ¹ ,
ZHANG Ling-Xue ¹ ,
HE Jing ¹ ,
LI Tao ¹ ,
WEI Gang ³ ,
DONG Nan ^1,2

1.
School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China;
2.
Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guiyang 550025, China;
3.
Commonwealth Scientific and Industrial Research Organization, Manufacturing, New South Wales 2070, Australia

Received Date: 25 July 2018
Revised Date: 20 December 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (No.21665005) and the "ChunHui Project" of Ministry of Education of China(No. Z2017006).

A method of stir bar sorptive extraction (SBSE) based on monohydroxyl cucurbit7 uril (Q7-OH)-liquid desorption (LD)-high performance liquid chromatography (HPLC)-ultraviolet detection was developed for measurement of three residual estrogens (bisphenol A, estradiol and diethylstillbestrol) from animal-derived foods (pork and chicken samples). The hydroxyl polydimethylsiloxane (PDMS-OH)/Q7-OH-coated stir bar was conducted by the sol-gel technique with the synthesized Q7-OH as a selective stationary phase. The innovative SBSE exhibited a rough and porous surface structure, a good preparation reproducibility (RSD ≤ 8.4%) and a long lifespan. Extraction mechanism indicated that the increase of extraction efficiency was attributed to the excellent molecular recognition of Q7 towards analytes. Under the optimal experimental conditions, the limits of detection of the developed PDMS/Q7-OH SBSE-LD-HPLC-UV method were 0.05-0.56 μg/L for the target estrogens with enrichment factors of 19-25 folds, the dynamic linear range was 0.2-5000 μg/L, and the RSDs were in the range of 3.9%-7.5% (n=5, C=100 μg/L). The mean recoveries (n=3) at three different concentration levels were 72.7%-109.2%. The developed method was simple, sensitive, and selective, and was successfully applied to the analysis of estrogens in animal-derived foods (pork and chicken samples).
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