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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Performance of Avocado Seed Activated Carbon as Adsorbent for Highly Sensitive Determination of Cd Using a Flow Injection System Online Coupled to TS-FF-AAS

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Author(s):
Kudo, Marianne V. F. [1] ; de Oliveira, Leandro L. G. [1] ; Suquila, Fabio A. C. [1] ; de Almeida, Fernanda G. [1] ; Segatelli, Mariana G. [1] ; Lima, Eder C. [2] ; Dias, Silvio L. P. [2] ; Tarley, Cesar R. T. [1, 3]
Total Authors: 8
Affiliation:
[1] Univ Estadual Londrina, Dept Quim, BR-86051990 Londrina, Parana - Brazil
[2] Univ Fed Rio Grande do Sul, Inst Quim, BR-90040060 Porto Alegre, RS - Brazil
[3] Univ Estadual Campinas, UNICAMP, Inst Quim, Inst Nacl Ciencia & Tecnol Bioanalit INCTBio, Dept, BR-13083970 Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of the Brazilian Chemical Society; v. 31, n. 1, p. 100-108, JAN 2020.
Web of Science Citations: 0
Abstract

A flow-injection preconcentration system using detection by the thermospray flame furnace atomic absorption spectrometry (FIA-TS-FF-AAS) is proposed. Cd2+ are adsorbed on avocado seed activated carbon (ASAC) packed into a cylindrical mini-column and eluted using HCl solutions for the detection system. A 25–1 fractional factorial and Doehlert matrix design were employed to determine the optimum conditions for cadmium preconcentration (pH 7.68, buffer concentration (Tris/Tris-HCl) of 0.023 mol L-1, eluent concentration (HCl) of 2.0 mol L-1, the adsorbent mass of 100.0 mg and preconcentration flow rate of 4.8 mL min-1). The preconcentration method presents linearity within the range of 0.41-15.00 µg L-1, limits of quantification and detection of 0.41 and 0.12 µg L-1, respectively, preconcentration factor of 10.7, consumption of index of 0.93 mL and sample throughput of 26 h-1. The precision assessed as the relative standard deviation (RSD) were found to be 0.48, 0.90 and 2.30% for inter-day precision (n = 2), and 0.30, 0.44 and 2.48% for intra-day precision (n = 6) for respective cadmium concentration of 0.50, 5.00 and 15.00 µg L-1. The proposed method was applied satisfactorily in samples of cigarette (62.84 ± 11.28 µg kg-1), human hair (69.61 ± 2.38 µg kg-1) and water samples [lake (0.65 ± 0.01 µg L-1), tap and mineral]. (AU)

FAPESP's process: 14/50867-3 - INCT 2014: National Institute of Science and Technology in Bioanalysis
Grantee:Marco Aurelio Zezzi Arruda
Support Opportunities: Research Projects - Thematic Grants