Bibliographic Details
| Title: |
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 |
| Authors: |
Kudo, Marianne V. F., Oliveira, Leandro L. G. de, Suquila, Fabio A. C., Almeida, Fernanda G. de, Segatelli, Mariana G., Lima, Éder C., Dias, Silvio L. P., Tarley, César R. T. |
| Source: |
Journal of the Brazilian Chemical Society. January 2020 31(1) |
| Publisher Information: |
Sociedade Brasileira de Química, 2020. |
| Publication Year: |
2020 |
| Subject Terms: |
thermospray flame furnace atomic absorption spectrometry, Doehlert matrix, water samples, cigarette, human hair |
| More Details: |
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]. |
| Document Type: |
article |
| File Description: |
text/html |
| Language: |
English |
| ISSN: |
0103-5053 |
| DOI: |
10.21577/0103-5053.20190132 |
| Access URL: |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532020000100100 |
| Rights: |
info:eu-repo/semantics/openAccess |
| Accession Number: |
edssci.S0103.50532020000100100 |
| Database: |
SciELO |
