Sun, Jian Zheng, Zheheng Jia, Zixiao Wang, Jiabin Lin, Xucong
Published in
Journal of chromatography. A
Herein, an ionic covalent organic framework (iCOF) surface grafting monolithic sorbent was prepared by the multivariate surface self-assembly strategy for in-tube solid-phase microextraction (SPME) of trace aristolochic acids (AAs) in serum, traditional Chinese medicines (TCMs) and Chinese patent drug. Via adjusting the proportion of ionic COF buil...
Ishizaki, Atsushi Ozawa, Kazutaka Kataoka, Hiroyuki
Published in
Journal of chromatography. A
Contamination of active pharmaceutical ingredients (APIs) and pharmaceutical preparations with carcinogenic N-nitrosamines has led to recalls of these products and supply shortages to patients. The present study describes the development of a highly sensitive method for simultaneous analysis of seven N-nitrosamines using on-line in-tube solid-phase...
Mejía-Carmona, Karen Lanças, Fernando M
Published in
Journal of chromatography. A
Given the increasing need for analyzing natural or contaminating compounds in complex food matrices in a simple and automated way, coupling miniaturized sample preparation techniques with chromatographic systems have become a growing field of research. In this regard, given the low extraction efficiency of conventional sorbent phases, the developme...
Ma, Yanxia Hao, Lixian Lin, Xiangjun Liu, Xiaofei Qiu, Xinni Zhang, Xiaoting Hu, Xiaogang
Published in
Journal of chromatography. A
As an endogenous nucleoside, adenosine was significant for the diagnosis and treatment of some diseases, such as schizophrenia. However, due to the complicated matrix interference, it was difficult to monitor trace or ultra-trace adenosine directly in bio-samples. In this contribution, a novel in-tube SPME technique based on aptamer/Au nanoparticle...
Ishizaki, Atsushi Kataoka, Hiroyuki
Published in
Analytica chimica acta
A simple and sensitive method, using automated online in-tube solid-phase microextraction (SPME) coupled with liquid chromatography-tandem mass spectrometry (LC-MS/MS), was developed for the determination of four tobacco-specific nitrosamines (TSNAs) in mainstream and sidestream smoke of combustion cigarettes and heated tobacco products. These TSNA...
Ponce-Rodríguez, H D García-Robles, A A Sáenz-González, P Verdú-Andrés, J Campíns-Falcó, P
Published in
Journal of pharmaceutical and biomedical analysis
In-tube solid phase microextraction (IT-SPME) coupled on-line to capillary liquid chromatography with diode array detection provides a simple and fast analytical methodology for the simultaneous quantitation of caffeine and its three primary metabolites (theobromine, paraxanthine and theophylline) in micro samples of serum, saliva and urine matrice...
Jiang, Nan Wang, Jiabin Li, Wenbang Xiao, Jianhua Li, Jianhua Lin, Xucong Xie, Zenghong You, Lijun Zhang, Qiqing
Published in
Journal of chromatography. A
Based on our developed sodium hyaluronate-functionalized urea-formaldehyde (HA-UF) monolith, a silver nanoparticles-coated monolithic column has been fabricated via the interaction between silver nanoparticles (Ag NPs) and HA. The successful coating of Ag NPs on the parent monolith was proven by SEM, EDAX, UV-vis spectrum and XPS. Nitrogen adsorpti...
Jillani, Shehzada Muhammad Sajid Alhooshani, Khalid
Published in
Journal of chromatography. A
Sol-gel urea functionalized-[bis(hydroxyethyl)amine] terminated polydimethylsiloxane coating was developed for capillary microextraction-high performance liquid chromatographic analysis from aqueous samples. A fused silica capillary is coated from the inside with surface bonded coating material and is created through in-situ sol-gel reaction. The u...
Wu, Fangling Xu, Chongsheng Jiang, Nan Wang, Jiabin Ding, Chuan-Fan
Published in
Talanta
A poly (methacrylic acid-co-divinyl-benzene) [poly (MAA-co-DVB)] monolithic column was specially prepared according to the chemical structures of the three mycotoxins of aflatoxin B1, zearalenone and sterigmatocystin, and used for in-tube solid-phase microextraction (in-tube SPME) of the selected mycotoxins. The poly (MAA-co-DVB) monolithic column ...
Bu, Yanan Feng, Juanjuan Tian, Yu Wang, Xiuqin Sun, Min Luo, Chuannan
Published in
Journal of chromatography. A
Aerogels have received considerable attentions because of its porous, high specific surface, unique properties and environmental friendliness. In this work, an organically modified silica aerogel was functionalized on the basalt fibers (BFs) and filled into a poly(ether ether ketone) (PEEK) tube, which was coupled with high performance liquid chrom...
