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141.
Qiang Yin Rahima Abdulla Gulmira Kahar Haji Akber Aisa Chunting Li Xuelei Xin 《Molecules (Basel, Switzerland)》2022,27(11)
This work aimed to develop and evaluate a post-acquisition data processing strategy, referred to as a mass defect filter (MDF), for rapid target the resin glycosides in root of Convolvulus scammonia by setting mass rang and mass defect range from high-resolution MS data. The full-scan mass data were acquired by high-performance liquid chromatography coupled with Q Exactive Plus hybrid quadrupole-orbitrap mass spectrometer that featured high resolution, mass accuracy, and sensitivity. To screen resin glycosides, three parent filter m/z 871, m/z 853, and m/z 869 combined with diagnostic fragment ions (DFIs) approach were applied to remove the interference from complex herbal extract. The targeted components were characterized based on detailed fragment ions. Using this approach, 80 targeted components, including 22 glycosidic acids and 58 resin glycosides were tentatively identified. The present results suggested that the proposed MDF strategy would be adaptable to the analysis of complex system in relevant filed. 相似文献
142.
Aflatoxin determination is imperative among agricultural and food products as the pollution of the toxic aflatoxin could cause severe hazards towards animals and human beings. Here, we prepared Elaeagnus gum derived porous carbon material as electrode modified material. In situ electropolymerization of molecularly imprinted polymer utilizing phenol as monomer and aflatoxin B1 as target template was further processed onto the porous carbon surface to achieve aflatoxin B1 sensing ability. This sensitive MIP sensor has a detection range from 5 pM to 100 pM of aflatoxin B1, an electrochemical sensitivity of 82.4 μA log(pM)−1 cm−2 with a detection limit of 1.7 pM, and a recovery rate of real sample measurement is 98.21 %. Good selectivity, fair repeatability and stability was confirmed. This work demonstrates the promising application of Elaeagnus gum derived porous carbon modified electrode sensor for food and drug monitoring. 相似文献
143.
Dr. Mohd Waheed Dr. Meshari A. Alsharif Dr. Mohammed Issa Alahmdi Dr. Sayeed Mukhtar Dr. Humaira Parveen 《European journal of organic chemistry》2023,26(14):e202300136
An efficient, environmentally benign and one-pot approach for the synthesis of 2-arylimino-2H-chromenes from 2-hydroxybenzyl alcohols and β-ketothioamides at room temperature under visible light has been developed. The reported reaction conditions were favorable for a wide range of β-ketothioamides afforded good to excellent yields of the respective products. The low cost and air stable Knölker iron catalyst has been employed for the dehydrogenation of 2-hydroxybenzyl alcohols under photolysis that would usually require a higher temperature. 相似文献