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  1. No Access

    Article

    Using 4-(Carbazole-9-yl)-benzyl Chloroformate as a Derivatization Reagent for the Measurement of Amino Acids in Tea Samples by High-Performance Liquid Chromatography with Fluorescence Detection

    An effective method for the determination of 20 free amino acids in tea samples using 4-(carbazole-9-yl)-benzyl chloroformate (CBBC-Cl) as a derivatization reagent by high-performance liquid chromatography com...

    Xu Wang, **mao You, Zhiwei Sun, Zhongyin Ji, Shijuan Zhang… in Chromatographia (2020)

  2. No Access

    Article

    Determination of Ultraviolet Filters in Domestic Wastewater by LC–MS Coupled with Polydopamine-Based Magnetic Solid-Phase Extraction and Isotope-Coded Derivatization

    A selective and accurate liquid chromatography–mass spectrometry (LC-MS) method based on magnetic solid-phase extraction (MSPE) and isotope-coded derivatization was developed and validated. The magnetic polydo...

    Jie Cheng, **aojian Kong, Shucheng Liu, Dandan Che, Zhiwei Sun… in Chromatographia (2018)

  3. No Access

    Article

    Optimization of Release Conditions for Acetylated Amino Sugars from Glycoprotein with the Aid of Experimental Design and Their Sensitive Determination with HPLC

    The presence or absence of acetyl groups in oligosaccharides greatly affects the biological activities of glycoproteins. Consequently, in studies on glycoproteins, sensitive and accurate methods are required f...

    Lian **a, Lijie Liu, Fengli Qu, Rongmei Kong, Guoliang Li, **mao You in Chromatographia (2017)

  4. No Access

    Article

    Determination of Triterpene Acids from 37 Different Varieties of Raspberry using Pre-column Derivatization and HPLC Fluorescence Detection

    In this work, we have developed an efficient method for the rapid extraction and separation of triterpene acids from 37 different varieties of raspberry via ultrasound-assisted dispersive liquid–liquid microex...

    Yuwei Wang, Yourui Suo, Yanan Sun, **mao You in Chromatographia (2016)

  5. No Access

    Article

    Determination of Free Fatty Acids of Chinese Coriandrum sativum L. Using Benzimidazo[2,1-b]quinazolin-12(6H)-one-5-ethyl-p-toluenesulfonate as Precolumn Labeling Reagent by LC with Fluorescence Detection

    A new fluorescent labeling reagent, benzimidazo[2,1-b]quinazolin-12(6H)-one-5-ethyl-p-toluenesulfonate (BQETS) was designed and synthesized, and it was successfully applied to the determination of fatty acids wit...

    Yanan Sun, **a Zhang, Zhongyin Ji, Cuihua Song, Zhiwei Sun, **mao You in Chromatographia (2016)

  6. No Access

    Article

    Convenient and Sensitive HPLC Method for Determination of Nitrosamines in Foodstuffs Based on Pre-column Fluorescence Labeling

    The determination of trace nitrosamines (NAs) has received more and more attention due to NAs’ strong carcinogenicity and wide existence in foodstuffs. But the convenient and sensitive method for simultaneousl...

    Mei Zhao, Guoliang Li, Weiheng Kong, Shuaimin Lu, Lian **a, Guang Chen… in Chromatographia (2016)

  7. No Access

    Article

    Development of an Efficient HPLC Fluorescence Detection Method for Brassinolide by Ultrasonic-Assisted Dispersive Liquid–Liquid Microextraction Coupled with Derivatization

    A novel hyphenated technique based on ultrasonic-assisted dispersive liquid–liquid microextraction (UA-DLLME) coupled with derivatization has been established for the determination of brassinolide (BL, a repre...

    Tao Lv, **an-En Zhao, Shuyun Zhu, Zhongyin Ji, Guang Chen, Zhiwei Sun… in Chromatographia (2014)

  8. No Access

    Article

    Fluorescence Probe of 10-Phenyl-acridone-2-sulfonyl Chloride and Its Application for Determination of Free Aliphatic Amines in Environmental Samples by HPLC with Fluorescence Detection and APCI-MS

    A simple and sensitive method for the determination of free aliphatic amines using 10-phenyl-acridone-2-sulfonyl chloride (PASC) as a labeling reagent by high-performance liquid chromatography with fluorescenc...

    Shu**g Ning, **mao You, Zhiwei Sun, Shijuan Zhang, Zhongyin Ji in Chromatographia (2012)

  9. No Access

    Article

    A Novel Labeling Reagent of 2-(12-Benzo[b]acridin-5-(12H)-yl)-acetohydrazide for Determination of Saturated and Unsaturated Fatty Acids in Traditional Chinese Herbs by HPLC-APCI-MS

    A new fluorescence labeling reagent 2-(12-benzo[b]acridin-5(12H)-yl)-acetohydrazide (BAAH) has been designed for fatty acids labeling. Eleven fatty acids containing seven saturated and four unsaturated fatty acid...

    Yinfeng **e, Guoliang Li, **mao You, **nwei Bai, Chengyan Wang… in Chromatographia (2012)

  10. No Access

    Article

    LC Determination of Trace Biogenic Amines in Foods Samples with Fluorescence Detection and MS Identification

    A pre-column derivatization method for the simple, sensitive determination of biogenic amines using 10-ethyl-acridine-3-sulfonyl chloride (EASC) as labeling reagent with fluorescence detection and mass spectro...

    Li Kang, **mao You, Zhiwei Sun, Chengyan Wang, Zhongyin Ji… in Chromatographia (2011)

  11. No Access

    Article

    LC-Fluorescence Detection Analysis of Amino Acids from Stellera chamaejasme L. Using 2-[2-(Dibenzocarbazole)-ethoxy] Ethyl Chloroformate as Labeling Reagent

    A pre-column derivatization method for the sensitive determination of amino acids using the tagging reagent 2-[2-(dibenzocarbazole)-ethoxy] ethyl chloroformate (DBCEC) followed by liquid chromatography with fl...

    Zhiwei Sun, **mao You, Cuihua Song in Chromatographia (2010)

  12. No Access

    Article

    Determination of Free Fatty Acids from Soil by LC–MS with Fluorescence Detection and Atmospheric Pressure Chemical Ionization Identification

    A simple and highly sensitive method for the determination of fatty acids using liquid chromatography with fluorescence detection is described. Fatty acids were derivatized by a new novel pre-column derivatiza...

    **angming Chen, **uli Dong, **mao You in Chromatographia (2010)

  13. No Access

    Article

    Determination of Fatty Acids (C1 – C10) from Bryophytes and Pteridophytes

    A simple and mild method for the determination of fatty acids (C1 – C10) based on a condensation reaction using 7-aminonaphthalene-1,3-disulfonic acid (ANDSA) as labeling reagent with capillary zone electrophores...

    **n-Wei Bai, Cui-Hua Song, **-Mao You, Zhi-Wei Sun, Yan-Yan Fu… in Chromatographia (2010)

  14. 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)

  15. 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)

  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

    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)

  18. 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)

  19. 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)

  20. 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)

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