Yaolu Ma

East China Normal University

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Qingcui Chu

East China Normal University

Jiannong Ye

East China Normal University

Xiaoshuang Zhao

East China Normal University

Dan Luo

South China Normal University

Yiliang Zheng

East China Normal University

Yi Xin Heng

Malaysian Rubber Board

Yujuan Ren

Jilin University

Tingting Wang

Ningbo University of Technology

Fei Cun

Fudan University

Jiaxing Kong

Nanjing Normal University

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East China Normal University

Chinese Academy of Sciences

Jilin University

Fudan University

Malaysian Rubber Board

International Medical University

State Key Laboratory of Supramolecular Structure and Materials

Henan Polytechnic University

University of Science and Technology Beijing

Guizhou University

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Electrochemical Determination of Salivary N‐Acetylneuraminic Acid by Miniaturized Capillary Electrophoresis Coupled with Sample Stacking

Chinese Journal of Chemistry (2016)

Yiliang Zheng Tingting Wang Jiaxing Kong Yaolu Ma Yi Xin Heng

Abstract Due to their important biological role as markers for different pathologies, sialic acid (SA) analyses are important for clinical research. In this work, a miniaturized capillary electrophoresis with amperometric detection (mini‐CE‐AD) was developed for the determination of N ‐acetylneuraminic acid (NANA), which is the most widespread form of SAs. NANA was first oxidized by periodic acid in an acidic solution, and then the oxidation product β ‐formyl pyruvic acid was derivatized with electroactive 2‐thiobarbituric acid (TBA) to form an electroactive NANA‐TBA adduct, which could be readily determined by mini‐CE‐AD. The limit of detection (LOD) of NANA‐TBA could achieve 0.50 µg/mL (1.6 µmol·L −1 , S/N=3) based on an online enrichment approach of moving chemical reaction boundary. The proposed method was successfully applied to the analysis of NANA in human saliva, and the recoveries were in the range of 91.8% –109% with RSDs of 1.8% –3.9%. Due to its simple design and construction, low cost and portability, the mini‐CE‐AD device will possess more practicability in more field work as an alternative to conventional and microchip CE approaches.

N-Acetylneuraminic acid

Amperometry

10.1002/cjoc.201600189

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Salt‐effect enhanced hollow‐fiber liquid‐phase microextraction of glutathione in human saliva followed by miniaturized capillary electrophoresis with amperometric detection

Electrophoresis (2019)

Dan Luo Zhonghui Fang Xiaoshuang Zhao Yaolu Ma Jiannong Ye

A hollow-fiber liquid-phase microextraction (HF-LPME) method was established for purification and enrichment of glutathione (GSH) in human saliva followed by a miniaturized capillary electrophoresis with amperometric detection system (mini-CE-AD). Based on regulating isoelectric point and increasing salt effect to modify donor phase, HF-LPME could provide high enrichment efficiency for GSH up to 471 times, and the extract was directly injected for mini-CE-AD analysis. The salt-effect enhanced HF-LPME/mini-CE-AD method has been successfully applied to saliva analysis, and acceptable LOD (0.46 ng/mL, S/N = 3) and recoveries (92.7-101.3%) could be obtained in saliva matrix. The sample pretreatment of this developed method was simple and required no derivatization, providing a potential alternative for non-invasive fluid analysis using portable instrument.

Amperometry

10.1002/elps.201900390

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Fast Determination of Main Bioamines and Precursor Amino Acids in Beer by Miniaturized Electrophoresis Using Gold Nanoparticle Composite Electrode

Food Analytical Methods (2018)

Dan Luo Xiaoshuang Zhao Yiliang Zheng Yaolu Ma Fei Cun

Amperometry

10.1007/s12161-018-1395-7

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Citations (8)