Premium
Photoresponsive molecularly imprinted polymers based on 4‐[(4‐methacryloyloxy)phenylazo] benzenesulfonic acid for the determination of sulfamethazine
Author(s) -
Huang Weihong,
Si Haojie,
Zhang Liming,
Yin Xifeng,
Ji Zehua,
Ni Xiaoni,
Xu Wanzhen
Publication year - 2021
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.202100118
Subject(s) - molecularly imprinted polymer , chemistry , adsorption , benzenesulfonic acid , polymer , chromatography , methacrylate , ethylene glycol dimethacrylate , molecular imprinting , monomer , methacrylic acid , polymer chemistry , chemical engineering , organic chemistry , selectivity , catalysis , engineering
Abstract Core–shell structured photoresponsive molecularly imprinted polymers were developed for the determination of sulfamethazine in milk samples. The photoresponsive imprinted polymers were prepared with polymethyl methacrylate containing a mass of ester groups as core, sulfamethazine as template molecules, self‐synthesized water‐soluble 4‐[(4‐methacryloyloxy)phenylazo] benzenesulfonic acid as a photoresponsive monomer, and ethylene dimethacrylate as cross‐linker. Interestingly, the imprinted polymer can specifically adsorb sulfamethazine under dark and 440 nm irradiation, and release it at 365 nm. A series of adsorption experiments showed that the maximum adsorption capacity reached 12.5 mg⋅g –1 , and the adsorption equilibrium was achieved within 80 min. Moreover, the imprinted polymers display excellent reusability, with almost no performance loss after four times photo‐controlled adsorption‐release cycles, and the imprinted polymers have excellent selectively for sulfamethazine (imprinting factor = 3.01). In the end, the imprinted polymers realized effective separation and enrichment of sulfamethazine in milk, with a recovery rate of over 97.5%. The material can be used as a solid‐phase extractant in the process of enrichment and separation for the quantitative detection of sulfamethazine in milk samples.