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J Chromatogr A 2021 Mar 26;1645:462107. Epub 2021 Mar 26.

Department of Chemistry, University of Turin, Via P. Giuria 7, 10125 Turin, Italy. Electronic address:

In the analysis of contaminants in food products, sample preparation is performed by proper adsorbents, whose choice is crucial to eliminate matrix interference. In this work we modified SBA-15 adsorbents by functionalization with (3-aminopropyl)-triethoxysilane (SBA-15-APTES) and N-[3-(trimethoxysilyl)propyl]aniline (SBA-15-AN) aiming to use them for the first time in the clean-up step of a QuEChERS (quick, easy, cheap, effective, rugged and safe) extraction of micropollutants from strawberry, a sugar rich fruit. After physico-chemical characterization by nitrogen adsorption, infrared spectroscopy and thermogravimetric analysis, the adsorption capabilities of SBA-15 sorbents and possible interaction mechanisms were studied at different pH (2. Read More

Anal Chem 2021 Apr 15. Epub 2021 Apr 15.

Department of Chemistry and Institutes of Biomedical Sciences, Fudan University, Shanghai 200433, P.R. China.

Nascent proteome is crucial in directly revealing how the expression of a gene is regulated on a translation level. In the nascent protein identification, puromycin capture is one of the pivotal methods, but it is still facing the challenge in the deep profiling of nascent proteomes due to the low abundance of most nascent proteins. Here, we describe the synthesis of puromycin-modified silica microspheres (PMSs) as the sorbent of dispersive solid-phase microextraction and the establishment of the PMS-based nascent proteomics (PMSNP) method for efficient capture and analysis of nascent proteins. Read More

J Sep Sci 2021 Apr 15. Epub 2021 Apr 15.

School of Light industry, Beijing Technology and Business University, Beijing, 10048, PR China.

Highly hydrophilic magnetic molecularly imprinted polymers were prepared through a surface imprinting technique for dispersive solid phase, coupled with high performance liquid chromatography to detect trace levels of 10 sulfonamides in animal-derived samples. The obtained imprinted polymers were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, and adsorption experiments, which exhibited excellent specific adsorption for template sulfamethazine in aqueous solution. Moreover, the adsorption process could be completed within 25 min. Read More

Anal Bioanal Chem 2021 Apr 4. Epub 2021 Apr 4.

Key Laboratory of Separation Science for Analytical Chemistry, National Chromatographic Research and Analysis Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.

Fluoroquinolone (FQ) residues in foods of animal origin may threaten public health but are challenging to determine because of their low contents and complex matrices. In this study, novel polyethyleneimine-functionalized FeO/attapulgite magnetic particles were prepared by a simple co-mixing method and applied as hydrophilic sorbents for the magnetic dispersive solid-phase extraction (MSPE) of three FQs, i.e. Read More

Molecules 2021 Mar 25;26(7). Epub 2021 Mar 25.

Pesticide Toxicology Laboratory, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, India.

A quick, sensitive, and reproducible analytical method for the determination of 77 multiclass pesticides and their metabolites in and tomato by gas and liquid chromatography tandem mass spectrometry was standardized and validated. The limit of detection of 0.19 to 10. Read More