NDLI: Vibrating screen printed electrode of gold nanoparticle-modified carbon nanotubes for the determination of arsenic(III)

Content Provider	Springer Nature Link
Author	Gamboa, Juan C. M. Cornejo, L. Squella, J. A.
Copyright Year	2014
Abstract	A linear sweep anodic stripping voltammetric method using a carbon nanotube–gold nanoparticle-modified vibrating screen printed electrode for the determination of arsenic(III) is reported. The experiments were conducted with a 0.1 mol L$^{−1}$ solution of H$_{2}$SO$_{4}$ in order to estimate the electrode area related to gold oxide formation. The results showed a clear reduction peak at approximately +0.85 V corresponding to the reduction of the gold surface oxide with a superficial area of 0.089 cm$^{2}$. A vibrating motor was attached to the screen printed electrode to create a portable and autonomous system with enhanced mass transfer. The repeatability of the measurements was 2.4 % (n = 10) at the level of 0.5 mg L$^{−1}$ of arsenic(III) under the best instrumental operating conditions. The peak current was linearly dependent on the arsenic(III) concentration, thus allowing the construction of a linear analytical curve in the range from 10 to 550 μg L$^{−1}$ with the equation: −I$_{p}$ (μA) = 0.05 + 134.59 [As(III) (μg L$^{−1}$)], R$^{2}$ = 0.99. The obtained detection and quantification limits were 0.5 (3 SD) and 1.5 (10 SD) μg L$^{−1}$, respectively, using 120 s as the deposition time. It was shown that Cu(II) does not interfere in the detection of As(III) using the proposed method.
Starting Page	1255
Ending Page	1260
Page Count	6
File Format	PDF
ISSN	0021891X
Journal	Journal of Applied Electrochemistry
Volume Number	44
Issue Number	12
e-ISSN	15728838
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-08-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Arsenic(III) Gold nanoparticles Carbon nanotubes Screen printed Electrochemistry Physical Chemistry Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Chemical Engineering Electrochemistry

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