期刊
FOOD CHEMISTRY
卷 363, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.130385
关键词
Ratiometric electrochemical sensor; Molecularly imprinted polymer; Poly(thionine); Ionic liquid; Citrinin; Hierarchical porous carbon
资金
- National Natural Science Foundation of China [21775112]
A molecularly imprinted polymer-based ratiometric electrochemical sensor (MIP-RECS) was developed for citrinin detection, showing promising results in real sample testing.
Citrinin can cause serious human diseases, thus its detection in foods is necessary. Herein, a molecularly imprinted polymer-based ratiometric electrochemical sensor (MIP-RECS) was presented for citrinin detection. The sensor was fabricated by electropolymerization, using thionine as monomer and citrinin as template. The ionic liquid decorated boron and nitrogen co-doped hierarchical porous carbon (BN-HPC) as supporter, provided large surface for anchoring thionine and citrinin. Poly(thionine) not only acted as MIP, but also acted as reference probe. When [Fe(CN)6] 3-/4- was adopted as indicating probe, the resulting sensor demonstrated a wide linear detection range (i.e. 1 x 10-3-10 ng mL-1) and a low detection limit (i.e. 1 x 10-4 ng mL-1).The sensor was applied to the detection of spiked citrinin in real samples, and satisfactory recovery (i.e. 97% - 110%) was obtained. Hence, it was promising for citrinin detection.
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