Detail publikace

Fast pulsed amperometric waveform for miniaturised flow-through electrochemical detection: Application in monitoring graphene oxide reduction

ISLAM, M. KORESHKOVA, A. GUPTA, V. LEWIS, T. MACKA, M. PAULL, B. MAHBUB, P.

Originální název

Fast pulsed amperometric waveform for miniaturised flow-through electrochemical detection: Application in monitoring graphene oxide reduction

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

A fast pulsed waveform (2-steps at +400 mV and -400 mV, 10 ms each, 50 Hz cycle repetition) was developed incorporated within a miniaturised EC detector, and used to demonstrate the pulsed amperometric detection (PAD) of hydrazine in a flow-based analytical system. In contrast to standard amperometric detection (AD), a subsequent surface oxide reduction step was applied within the PAD waveform. The PAD applied within a simple flow-injection analysis (FIA) method provided a limit of detection (LOD) just as low as 0.8 nM of hydrazine (RSD 5%, n = 9, linearity r(2) = 0.99 for 1 nM-100 mM), which is one order of magnitude lower than the lowest LOD reported todate. Significantly, the LOD was obtained using 5-20 times lower electrode surface area, flow rate, and sample volume, than in previous methods, with 15 times faster cycle repetition frequency than alternative PAD based studies reported in literature. Practical application of the PAD waveform was demonstrated by monitoring the temporal consumption of reducing agents during graphene oxide reduction experiments, separated using chromatographic methods (hydrazine in IC and ascorbic acid in HPLC).

Klíčová slova

Pulsed amperometric detection and fast waveform; Miniaturised flow-based electrochemical detection; Hydrazine and ascorbic acid; Graphene oxide reduction

Autoři

ISLAM, M.; KORESHKOVA, A.; GUPTA, V.; LEWIS, T.; MACKA, M.; PAULL, B.; MAHBUB, P.

Vydáno

20. 12. 2019

ISSN

0013-4686

Periodikum

Electrochimica Acta

Ročník

328

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1

Strany do

8

Strany počet

8

URL

https://www.sciencedirect.com/science/article/pii/S0013468619319589

BibTex

@article{BUT160537,
  author="ISLAM, M. and KORESHKOVA, A. and GUPTA, V. and LEWIS, T. and MACKA, M. and PAULL, B. and MAHBUB, P.",
  title="Fast pulsed amperometric waveform for miniaturised flow-through electrochemical detection: Application in monitoring graphene oxide reduction",
  journal="Electrochimica Acta",
  year="2019",
  volume="328",
  number="1",
  pages="1--8",
  doi="10.1016/j.electacta.2019.135087",
  issn="0013-4686",
  url="https://www.sciencedirect.com/science/article/pii/S0013468619319589"
}