Preparation of Trimethoprim Molecularly Imprinted Stir Bar Sorptive Extraction and Its Application for Trace Analysis of Trimethoprim and Sulfonamides in Complex Samples

Microextraction with polyethersulfone for bisphenol-A, alkylphenols and hormones determination in water samples by means of gas chromatography–mass spectrometry and liquid chromatography–tandem mass spectrometry analysis

“…One of the most used strategies for the determination of trace organic compounds in liquid matrices is centered on the miniaturization and automation of sample preparation techniques [11][12][13][14][15]. In addition to the well-established microextraction techniques, mainly solid phase microextraction (SPME) [11,[16][17][18] and stir bar sorptive extraction (SBSE) [19][20][21][22][23][24][25][26][27], polyethersulfone (PES) polymer has emerged recently [14,28,29] as a very suitable choice for the extraction of polar species, improving significantly the extraction efficiencies provided by other polymeric materials such as polydimethylsiloxane (PDMS), among others.…”

Jacket-free stir bar sorptive extraction with bio-inspired polydopamine-functionalized immobilization of cross-linked polymer on stainless steel wire

“…Cross-linked organic polymers are used widely in separation science; the polymer can be synthesized conveniently by co-polymerization of functional monomers and cross-linkers in the presence of porogens. The availability of functional monomers and cross-linkers with variable properties makes the cross-linked organic polymers applicable to different kinds of compounds [12,13]. In addition, both polar and nonpolar compounds can be extracted by polymers [14,15].…”

“…In addition, both polar and nonpolar compounds can be extracted by polymers [14,15]. Cross-linked organic polymers have been applied in sample pretreatment methods such as miniaturized solid-phase extraction [14], solid-phase microextraction (SPME) [7] and stir-bar sorptive extraction (SBSE) [13].…”

Novas estratégias de preparo de amostras complexas para a determinação de sulfonamidas

“…Com base no objetivo de empregar o material sintetizado como sorvente no preparo de amostra a figura de mérito recuperação foi selecionada para um estudo comparativo com os novos materiais relatados na literatura para extração de SAs em amostras de leite como grafeno, MIP entre outros (84,85,86,87).…”

“…Nota-se que não há uma diferença significativa quando compara-se aos obtidos na literatura (84,85,86,87). No entanto, nota-se que alguns materiais seletivos como MIP, por exemplo, apresentam valores de recuperação um pouco maiores devido ao fato de apresentarem elevada seletividade e/ou porosidade o que resulta em aumento da capacidade adsortiva do sorvente, obtendo-se assim, um maior fator de pré-concentração e, geralmente maiores valores de recuperação (85).…”