Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/13493
ชื่อเรื่อง: Ultra-high performance liquid chromatographic determination of antioxidants in teas using inkjet-printed graphene-polyaniline electrode
ผู้แต่ง: Bardpho C.
Rattanarat P.
Siangproh W.
Chailapakul O.
Keywords: Antioxidants
Chemical detection
Flavonoids
Graphene
High performance liquid chromatography
Ink
Ink jet printing
Liquids
Polyaniline
Screen printing
Chromatographic determination
ELectrochemical detection
Polyaniline nanocomposites
Polyphenolic
Screen-printed carbon electrodes
Simultaneous determinations
UHPLC
Ultra high performance liquid chromatography (UHPLC)
Electrochemical electrodes
aniline derivative
antioxidant
graphite
polyaniline
tea
chemistry
devices
electrochemical analysis
high performance liquid chromatography
printing
procedures
tea
Aniline Compounds
Antioxidants
Chromatography, High Pressure Liquid
Electrochemical Techniques
Graphite
Printing
Tea
วันที่เผยแพร่: 2016
บทคัดย่อ: A development of ultra-high performance liquid chromatographic coupled with a novel inkjet-printed conductive ink-modified electrode for a fast and simultaneous determination of polyphenolic antioxidants was achieved. Two printing techniques were selected for fabrication and modification including (i) an in-house screen-printing method and (ii) an inkjet-printing method, respectively. A conductive ink containing graphene and polyaniline nanocomposite (G-PANI) was precisely casted onto the surface of screen-printed carbon electrode (SPCE) using a dimatix inkjet material printer. Compared to a bare SPCE, the G-PANI-modified screen-printed carbon electrode (G-PANI/SPCE) exhibited higher electrochemical sensitivity with increase (2-4 times) of peak current of each antioxidant. Moreover, four antioxidants were successfully separated and determined within 3 min using a reverse phase ultra-high performance liquid chromatography (UHPLC) with a mobile phase containing phosphate buffer and acetonitrile (90:10 v/v). Under an optimal detection potential at +1.2 V vs. Ag/AgCl, linear calibrations and limits of detection (S/N=3) for antioxidants were found to be 0.01-10 μg mL-1 and 1.38-1.94 ng mL-1, respectively. Finally, this proposed method has been successfully used for the determination of antioxidants in tea samples, the results obtained from our presented method were within a highly good agreement those obtained from a standard UHPLC-UV method. © 2015 Elsevier B.V.
URI: https://ir.swu.ac.th/jspui/handle/123456789/13493
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84949089799&doi=10.1016%2fj.talanta.2015.05.020&partnerID=40&md5=928d99e72f9a318b279f00e3ef48351a
ISSN: 399140
Appears in Collections:Scopus 1983-2021

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