| Registro completo |
| Provedor de dados: |
Anais da ABC (AABC)
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| País: |
Brazil
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| Título: |
Application of modified simplex on the development of a preconcentration system for cadmium determination in sediments, food and cigarettes
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| Autores: |
SANTOS,QUEILA O.
MORENO,ISLANIA
SANTOS,LEANDRO DOS
SANTOS,ALDENOR G.
SOUZA,VALDINEI S.
BEZERRA,MARCOS A.
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| Data: |
2016-06-01
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| Ano: |
2016
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| Palavras-chave: |
Simplex optimization
Preconcentration
Cadmium
Sediments
Cigarettes
Food
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| Resumo: |
A modified simplex algorithm was used to optimize a system of preconcentration for cadmium determination in samples of sediments, cigarettes and food using flame atomic absorption spectrometry. The preconcentration system is based on the sorption of cadmium in a minicolumn packed with Amberlite XAD-2 resin functionalized with 3,4-dihydroxybenzoic acid (DHB). The optimized variables were pH and sampling flow rate and the optimum conditions found for these variables were, respectively 8.7 and 8.8 mL min-1. The developed system showed a preconcentration factor of 15.3, detection limit of 0.49 µg L-1, quantification limit of 1.65 µg L-1 and precision expressed as relative standard deviation (% RSD, n=10) of 5.9. The accuracy of the method was checked by analysis of estuary sediment certified reference material (NIST 1646-1). The cadmium concentrations found in sediment samples ranged from 1.73 and 1.90 µg g-1. In cigarette samples the results were 0.085 and 0.193 µg g-1, and in food samples (coriander and lettuce) the concentrations found of this metal were, respectively, 0.33 and 0.12 µg g-1.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000300791
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| Editor: |
Academia Brasileira de Ciências
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| Relação: |
10.1590/0001-3765201620150209
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| Formato: |
text/html
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| Fonte: |
Anais da Academia Brasileira de Ciências v.88 n.2 2016
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| Direitos: |
info:eu-repo/semantics/openAccess
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