28 Result(s)
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
