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- E-ISSN 2288-8985
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Electrochemically polyaniline-coated microextraction needle for phthalates in water
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2020, v.33 no.2, pp.76-85
https://doi.org/10.5806/AST.2020.33.2.76
(Department of Chemistry, Seoul Women’s University)
(Department of Chemistry, Seoul Women’s University)
(Department of Chemistry, Seoul Women’s University)
(Department of Chemistry, Seoul Women’s University)
(Department of Chemistry, Seoul Women’s University)
(Department of Chemistry, Seoul Women’s University)
(Department of Chemistry, Seoul Women’s University)
Yura,
H.
, Yelin,
L.
, Soyoung,
A.
, &
Sunyoung,
B.
(2020). Electrochemically polyaniline-coated microextraction needle for phthalates in water. Analytical Science and Technology, 33(2), 76-85, https://doi.org/10.5806/AST.2020.33.2.76
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Abstract
A stainless-steel needle (Hamilton 90022, 22 gauge, 718-μm o.d., 413-μm i.d., 51-mm length, bevel tip) with an electrochemically coated polyaniline layer having a microbore tunnel was newly prepared as a device for headspace in-needle microextraction. For designing the needle, the polyaniline layer length was optimized, and to evaluate the extraction efficiency for polycyclic aromatic hydrocarbons, numerous cyclic voltammetry scans were conducted. In addition, the optimization of the analytical conditions (including the adsorption and desorption parameters) and the validation of the analytical method were conducted. The optimized adsorption and desorption conditions were 40 °C for 30 min and 230 °C for 60 s, respectively. Finally, in this study, a polyaniline layer was electrochemically deposited on the in-needle surface, and it exhibited good thermal stability. The needle with the polyaniline layer was repeatedly used more than 200 times during this study. This method has some advantages in terms of the extraction time, extraction efficiency, and analysis cost.
- keywords
- polyaniline, cyclic voltammetry, polycyclic aromatic hydrocarbons, microextraction needle
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