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  1. No Access

    Article

    A simple and mild derivatization method for hydroxyl compounds using condensation agent carbazole-9-N-(2-methyl)-acetyl-benzene-disulfonate and its application for the determination of volatile alcohols from plasma by HPLC with fluorescence detection

    A simple and sensitive HPLC method for the determination of hydroxyl compounds including volatile alcohols from spiked plasma, using a fluorescent condensation agent, namely carbazole-9-N-(2-methyl)-acetyl-be...

    **mao You, Wenjian Lao, Qingyu Ou… in Fresenius' Journal of Analytical Chemistry (1999)

  2. No Access

    Article

    Microwave-Assisted Rapid Preparation of Substituted Carbazole-9-acetic and Propionic Acids and their Absorption and Fluorescence Spectra

     A rapid one-pot synthesis of substituted carbazole-9-acetic and -propionic acids under microwave irradiation is described. N-Alkylation and hydrolysis was carried out in DMF without catalyst. The absorption and ...

    Wenjian Lao, Xuejun Sun, **mao You, Qingyu Ou in Monatshefte für Chemie / Chemical Monthly (2000)

  3. No Access

    Article

    An improved derivatization method for sensitive determination of fatty acids by high-performance liquid chromatography using 9-(2-hydroxylethyl)-carbazole as derivatization reagent with fluorescence detection

    Tagging techniques with reagents used for fluorescent detection for short and long-chain fatty acids using high-performance liquid chromatography are evaluated in terms of the tagging reactions, handing, flexi...

    **mao You, Weibing Zhang, **angIan Jia, Yukui Zhang in Chromatographia (2001)

  4. No Access

    Article

    Determination of biogenic amines by RPHPLC with fluorescent detection after derivatization with 2-(9-carbazole)ethyl chloroformate (CEOC)

    The use of 2-(9-carbazole)ethyl chloroformate (CEOC) for pre-column derivatization of biogenic amines (BA) has been tested for the first time. The reagent reacts completely with BA within 3 min at ambient temp...

    **mao You, Yukui Zhang in Chromatographia (2002)

  5. No Access

    Article

    Analysis of Five Pharmacologically Active Compounds from Rhodiola for Natural Product Drug Discovery with Capillary Electrophoresis

    A rapid capillary electrophoresis method for the separation of five natural pharmacologically active compounds from extracted Rhodiola, namely salidroside, tyrosol, rhodionin, gallic acid and ethyl gallate has be...

    Yourui Suo, Honglun Wang, Yulin Li, **mao You, Hanqing Wang in Chromatographia (2004)

  6. No Access

    Article

    Development of a Sensitive Reagent, 1,2-Benzo-3,4-dihydrocarbazole-9-ethyl-p-toluenesulfonate, for Determination of Bile Acids in Serum by HPLC with Fluorescence Detection, and Identification by Mass Spectrometry with an APCI Source

    A pre-column derivatization method with 1,2-benzo-3,4-dihydrocarbazole-9-ethyl-p-toluenesulfonate (BDETS) as labeling reagent followed by high-performance liquid chromatography with fluorescence detection has bee...

    **mao You, Yunwei Shi, Yongfei Ming, Zhangyu Yu, Yanjun Yi, Jiayao Liu in Chromatographia (2004)

  7. No Access

    Article

    Pre-Column Derivatization of Amines with 1,2-Benzo-3,4-Dihydrocarbazole-9-Isopropyl Chloroformate Followed by LC-Fluorescence and LC-APCI-MS

    A pre-column derivatization method for the sensitive determination of amines using the labeling reagent 1,2-benzo-3,4-dihydrocarbazole-9-isopropyl chloroformate (BCIC-Cl) followed by high-performance liquid ch...

    **mao You, **angming Chen, **anen Zhao, Yourui Suo, Honglun Wang… in Chromatographia (2006)

  8. No Access

    Article

    Determination of 30 Free Fatty Acids in Two Famous Tibetan Medicines by HPLC with Fluorescence Detection and Mass Spectrometric Identification

    A simple and sensitive high-performance liquid chromatographic (HPLC) method with fluorescence detection and mass spectrometric identification has been developed for analysis of 30 long-chain and short-chain f...

    **g Sun, Guichen Chen, **anen Zhao, Wenhua Xu, Guoying Zhou, Youji Han… in Chromatographia (2007)

  9. No Access

    Article

    Study of a new derivatizing reagent that improves the analysis of amino acids by HPLC with fluorescence detection: application to hydrolyzed rape bee pollen

    A simple and sensitive method for evaluating the chemical compositions of protein amino acids, including cystine (Cys)2 and tryptophane (Try) has been developed, based on the use of a sensitive labeling reagent 2...

    **mao You, Lingjun Liu, Wenchen Zhao… in Analytical and Bioanalytical Chemistry (2007)

  10. No Access

    Article

    Mass Spectrometric Identification of Multihydroxy Phenolic Compounds in Tibetan Herbal Medicines

    A highly selective and accurate method based on derivatization with dansyl chloride coupled with liquid chromatography–mass spectrometry has been developed for identification of natural pharmacologically activ...

    **mao You, Chenxu Ding, Fang Zhu, Xuejun Sun, Yulin Li, Yourui Suo in Chromatographia (2007)

  11. No Access

    Article

    Determination of Free Fatty Acids in Bryophyte Plants and Soil by HPLC with Fluorescence Detection and Identification by Online MS

    A method for the determination of long and short chain free fatty acids (FFAs), using 1-[2-(p-toluenesulfonate)-ethyl]-2-phenylimidazole-[4,5-f]-9,10-phenanthrene (TSPP) as labeling reagent, has been developed. I...

    **anen Zhao, Honglun Wang, **mao You, Yourui Suo in Chromatographia (2007)

  12. No Access

    Article

    CE Determination of 2-(9-Carbazole)ethyl Chloroformate-Labeled Oligopeptides

    A pre-column derivatization method for sensitive determination of oligopeptides, using the tagging reagent 2-(9-carbazole)ethyl chloroformate (CEOC-Cl) followed by capillary electrophoresis (CE) with diode-arr...

    Chenxu Ding, Xuejun Sun, **anen Zhao, Wenchen Zhao, Yulin Li… in Chromatographia (2008)

  13. No Access

    Article

    LC-DAD-ESI-MS Characterization of Carbohydrates Using a New Labeling Reagent

    A novel labeling reagent 1-(2-naphthyl)-3-methyl-5-pyrazolone (NMP) coupling to liquid chromatography with electrospray ionization mass spectrometry for the detection of carbohydrates from the derivatized rape...

    Chenxu Ding, Lingyun Wang, Chunliang Tian, Yulin Li, Zhiwei Sun… in Chromatographia (2008)

  14. No Access

    Article

    10-Ethyl-acridine-2-sulfonyl Chloride: A New Derivatization Agent for Enhancement of Atmospheric Pressure Chemical Ionization of Estrogens in Urine

    The extensive metabolism and treatment of low doses of estrone (E1), estradiol (E2) and estriol (E3) in preclinical animal species necessitates a sensitive analytical method to identify or quantify the estroge...

    **mao You, Huaixin Zhao, Zhiwei Sun, Yourui Suo, Guichen Chen in Chromatographia (2009)

  15. No Access

    Article

    Determination and Identification of Primary Aliphatic Amines Using 4-(1H-Phenanthro[9,10-d]Imidazol-2-yl)Benzoic Acid as Novel Pre-Column Labeling Reagent by LC with Fluorescence Detection and Atmospheric Pressure Chemical Ionization Mass Spectroscopy

    4-(1H-Phenanthro[9,10-d]imidazol-2-yl)benzoic acid (PIBA), a new amine-reactive fluorescent probe was synthesized and used as a pre-column derivatizing reagent for the determination of aliphatic amines from envir...

    Zhiwei Sun, **mao You, Lian **a, Yourui Suo in Chromatographia (2009)

  16. No Access

    Article

    LC–ESI–MS Determination of 20 Free Amino Acids in Tibetan Medicine Gentiana dahurica with Pre-Column Fluorescence Derivatization

    Concentrations of 20 free amino aicds (FAAs) in a famous Tibetan medicine Gentiana dahurica was first investigated using 1,2-benzo-3,4-dihydrocarbazole-9-ethyl chloroformate (BCEOC) as the pre-column fluorescence...

    **g Sun, Faqiang Li, Wenhua Xu, Guoying Zhou, **mao You, Guichen Chen in Chromatographia (2009)

  17. No Access

    Article

    A sensitive analytical method for the component monosaccharides of the polysaccharides from a Tibetan herb Potentilla anserine L. by capillary zone electrophoresis with UV detector

    A rapid and sensitive method was optimized and validated for the separation and quantification of derivatized monosaccharides in polysaccharide from Potentilla anserine L. using 1-naphthyl-3-methyl-5-pyrazolone (...

    Lian **a, Zhi Wei Sun, Guo Liang Li, You Rui Suo… in European Food Research and Technology (2010)

  18. No Access

    Article

    2-(5-Benzoacridine)ethyl-p-toluenesulfonate as sensitive reagent for the determination of bile acids by HPLC with fluorescence detection and online atmospheric chemical ionization-mass spectrometric identification

    2-(5-Benzoacridine)ethyl-p-toluenesulfonate (BAETS), a dual-sensitive probe, was reacted with bile acids in the presence of K2CO3 catalyst in dimethyl sulfoxide (DMSO) solvent to give BAETS–bile acid derivatives....

    **mao You, Yanyan Fu, Zhiwei Sun, Yourui Suo in Analytical and Bioanalytical Chemistry (2010)

  19. No Access

    Article

    Determination of Free Fatty Acids in Tibet Folk Medicine Potentilla anserina L. Using a New Labeling Reagent by LC with Fluorescence Detection and Identification with Online Atmospheric Chemical Ionization-MS Identification

    A sensitive method for the determination of free fatty acids using 1,2-benzo-carbazole-9-ethyl-p-toluenesulfonate (BCETS) as tagging reagent with fluorescence detection has been developed. BCETS could easily and ...

    Lian **a, Cuihua Song, Zhiwei Sun, Guoliang Li, Yourui Suo, **mao You in Chromatographia (2010)

  20. No Access

    Article

    Comprehensive Comparisons between 1-Phenyl-3-methyl-5-pyrazolones, 1-(4-Methoxyphenyl)-3-methyl-5-pyrazolones and 1-(2-Naphthyl)-3-methyl-5-pyrazolones as Labeling Reagents Used in LC-DAD-ESI-MS-MS Analysis of Neutral Aldoses and Uronic Acids

    Comprehensive comparisons between three 1-aryl-3-methyl-5-pyrazolone (AMP) labeling reagents were carried out for the analysis of reductive monosaccharides using reversed phase high performance liquid chromato...

    Zhiwei Sun, Cuihua Song, Lian **a, **aoyan Wang, Yourui Suo, **mao You in Chromatographia (2010)

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