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Simple and Sensitive Determination of aromatic acids in Coconut Water by g-C3N4@SiO2 Based Solid-phase Extraction and HPLC-UV Analysis

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Chemical Research in Chinese Universities 2018年第4期34卷 528-535页

作者： QIANGBA Gezhen ZHU Gangtian YU Qiongwei FENG Yuqi Key Laboratory of Analytical Chemistry for Biology and Medicine Ministry of Education Department of Chemistry Wuhan University Wuhan 430072 P. R. China Key Laboratory of Tectonics and Petroleum Resources Ministry of Educan'on China University of Geosciences Wuhan 430075 P. R. China

In this study, graphitic carbon nitride deposited silica（g-C3N4@SiO2） was prepared by simple pyrolysis of melamine on silica and then used as a solid-phase extraction（SPE） sorbent for the extraction of four representative aromatic acids including benzoic acid（BA）, salicylic acid（SA）, indolyl-3-butyricacid（IBA） and naphthalene acetic acid（NAA） in coconut water（CW） samples, g-C3N4@SiO2 exhibited an excellent adsorption capacity for the four aromatic acids, which are in the concentration range of 500--558.8 gg/g. The four aromatic acids could be directly captured by g-C3N4@SiO2 from CW samples within 5 rain. Thus, a rapid, simple and effective method for the analy- sis of four aromatic acids in CW samples was developed by coupling g-C3N4@SiO2-based SPE with high performance liquid chromatography-ultraviolet（HPLC-UV） detection. The linearity of the developed method was in the range of 20--1000 ng/mL and its limit of detection was in the range of 1.9--5.7 ng/mL, which were signi- ficantly lower than those of the reported similar methods. The intra-day and inter-day precisions（based on the relative standard deviation, n=3） of the four aromatic acids were under 9.5% and 10.4%, respectively. The developed method was applied to determining the four aromatic acids in real CW samples and the spiked recoveries varied from 81.1% to 121.8%.

关键词： aromatic acid Coconut water Solid-phase extraction Graphitic carbon nitride High-performance liquidchromatography

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Extending aromatic acids on TiO_(2)for cooperative photocatalysis with triethylamine:Violet light-induced selective aerobic oxidation of sulfides

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Chinese Chemical Letters 2022年第8期33卷 3733-3738页

作者： Hui Li Xia Li Jun Zhou Wenlong Sheng Xianjun Lang Sauvage Center for Molecular Sciences College of Chemistry and Molecular SciencesWuhan UniversityWuhan 430072China

Designing visible light photocatalysts with a metal oxide semiconductor as the starting material could expand a new horizon for the conversion and storage of solar ***,the benchmark photocatalyst TiO_(2) was used to pursue this goal by anchoring aromatic *** the aromatic acid was strategically deployed to design TiO_(2) complexes with violet light-induced selective aerobic oxidation of sulfide as the probe *** benzoic acid(BA)as the initial molecule,horizontally extending one or two benzene rings furnishes 2-naphthoic acid(2-NA)and 2-anthracene acid(2-AA).Moreover,triethylamine(TEA),an electron transfer mediator,was introduced to maintain the integrity of the anchored aromatic ***,there was a direct correlation between theπ-conjugation of aromatic acid ligand and the selective aerobic oxidation of *** the three aromatic acids,2-AA delivered the best result over TiO_(2) due to the most extensiveπ-conjugated ***,violet light-induced selective aerobic oxidation of sulfides into corresponding sulfoxides was conveniently realized by cooperative photocatalysis of 2-AA-TiO_(2) with 10 mol%of *** work affords an extending strategy for designing the next-generation ligands for semiconductors to expand visible light-induced selective reactions.

关键词： aromatic acid Extendingπ-conjugation Complex photocatalyst Oxidation of sulfides Cooperative photocatalysis

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Highly efficient Rod-shape Poly(methacrylic acid-co-styrene-codivinylbenzene)High-performance Liquid Chromatographic Column

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Chinese Chemical Letters 1999年第2期10卷 151-154页

作者： Jin Fang WANG Zi Hui MENG Liang Mo ZHOU Qing Hai WANG Dao Qian ZHU(Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Dalian 116012) Chinese Acad Sci Dalian Inst Chem Phys Dalian 116012 Peoples R China

A highly efficient copolymer (methacrylic acid - co - styrene - divinylbenzene) in situ making high-performance liquid chromatographic column was prepared and evaluated. The column efficiency calculated in terms of height equivalent to a theoretical plate was 25 mu m and rapid separations of small molecules such as substituted aromatic hydrocarbons and aromatic acids were achieved within five minutes.

关键词： highly efficient column poly(methacrylic acid -co styrene-co-divinylbenzene) in situ column substituted aromatic hydrocarbon aromatic acid

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