Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Assessment of the performance of triphenylphosphine for the voltammetric determination of elemental sulphur in cosmetic products

Full text
Author(s):
Rossi Salamanca-Neto, Carlos Alberto [1] ; Scremin, Jessica [1] ; Fatibello-Filho, Orlando [2] ; Clausen, Debora Nobile [1] ; Sartori, Elen Romao [1]
Total Authors: 5
Affiliation:
[1] Univ Estadual Londrina, Ctr Ciencias Exatas, Dept Quim, Rodovia Celso Garcia Cid, PR-445 Km 380, CP 10-011, BR-86057970 Londrina, PR - Brazil
[2] Univ Fed Sao Carlos UFSCar, Ctr Ciencias Exatas & Tecnol, Rodovia Washington Luis, SP 310 Km 235, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: ANALYST; v. 143, n. 15, p. 3600-3606, AUG 7 2018.
Web of Science Citations: 1
Abstract

In this paper, an alternative voltammetric method for the determination of elemental sulphur in cosmetic products is presented. It is based on the decrease of triphenylphosphine oxidation current in the presence of elemental sulphur by using a glassy carbon electrode. A solution of 2% (m/v) acetic acid and 0.6 mol L-1 sodium acetate in methanol was used as a supporting electrolyte. The experimental conditions for indirect determination of elemental sulphur were established. Using square-wave voltammetry, the analytical curve was linear in the elemental sulphur concentration range of 9.94-271 mol L-1, with a detection limit of 2.59 mol L-1. The method was successfully applied to determine elemental sulphur in soap bars and anti-acne cream, without any preliminary sample treatment, therefore, it is shortened and simplified. The results obtained with the indirect voltammetric method were not statistically different in comparison with a titrimetric one, at a 95% confidence level. Additionally, excellent recovery percentages were obtained, proving no matrix interferences. (AU)

FAPESP's process: 09/14454-8 - Modified carbon electrodes with carbon nanotubes and/or metallic nanoparticles in chitosan film for determination of sulphur compounds in petroleum derivatives and food
Grantee:Elen Julciléia Romão Sartori
Support Opportunities: Scholarships in Brazil - Post-Doctoral