Next Article in Journal
Synthesis of Brushite Particles in Reverse Microemulsions of the Biosurfactant Surfactin
Previous Article in Journal
Molecular Characterization and Expression Pattern of Tripartite Motif Protein 39 in Gallus gallus with a Complete PRY/SPRY Domain
Int. J. Mol. Sci. 2011, 12(6), 3810-3820; doi:10.3390/ijms12063810
Article

Screen-Printed Carbon Electrodes Modified with Cobalt Phthalocyanine for Selective Sulfur Detection in Cosmetic Products

1
,
2
,
1
,
1
,
1
 and
1,*
1 Department of Cosmetic Science, Providence University 200 Chungchi Rd., Taichung 43301, Taiwan 2 Department of Safety, Health and Environmental Engineering, Hung Kuang University 34 Chungchi Rd., Taichung 43302, Taiwan
* Author to whom correspondence should be addressed.
Received: 13 April 2011 / Revised: 31 May 2011 / Accepted: 2 June 2011 / Published: 9 June 2011
(This article belongs to the Section Biochemistry, Molecular Biology and Biophysics)
View Full-Text   |   Download PDF [542 KB, uploaded 19 June 2014]   |   Browse Figures

Abstract

Cobalt phthalocyanine (CoPc) films were deposited on the surface of a screen-printed carbon electrode using a simple drop coating method. The cyclic voltammogram of the resulting CoPc modified screen-printed electrode (CoPc/SPE) prepared under optimum conditions shows a well-behaved redox couple due to the (CoI/CoII) system. The CoPc/SPE surface demonstrates excellent electrochemical activity towards the oxidation of sulfur in a 0.01 mol·L−1 NaOH. A linear calibration curve with the detection limit (DL, S/N = 3) of 0.325 mg·L−1 was achieved by CoPc/SPE coupled with flow injection analysis of the sulfur concentration ranging from 4 to 1120 mg·L−1. The precision of the system response was evaluated (3.60% and 3.52% RSD for 12 repeated injections), in the range of 64 and 480 mg·L−1 sulfur. The applicability of the method was successfully demonstrated in a real sample analysis of sulfur in anti-acne creams, and good recovery was obtained. The CoPc/SPE displayed several advantages in sulfur determination including easy fabrication, high stability, and low cost.
Keywords: sulfur; cosmetics; cobalt phthalocyanine; screen-printed carbon electrode sulfur; cosmetics; cobalt phthalocyanine; screen-printed carbon electrode
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote
MDPI and ACS Style

Chen, P.-Y.; Luo, C.-H.; Chen, M.-C.; Tsai, F.-J.; Chang, N.-F.; Shih, Y. Screen-Printed Carbon Electrodes Modified with Cobalt Phthalocyanine for Selective Sulfur Detection in Cosmetic Products. Int. J. Mol. Sci. 2011, 12, 3810-3820.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here

Comments

Cited By

[Return to top]
Int. J. Mol. Sci. EISSN 1422-0067 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert