Determination of cadmium in alcohol fuel using Moringa oleifera seeds as a biosorbent in an on-line system coupled to FAAS |
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Authors: | Vanessa Nunes Alves Nívia Maria Melo Coelho Kalya Cravo Di Pietro Roux Eduardo Carasek |
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Institution: | a Instituto de Química, Universidade Federal de Uberlândia, Uberlândia 38400-902, MG, Brazil b Departamento de Química, Universidade Federal de Santa Catarina, Florianópolis 88040900, SC, Brazil |
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Abstract: | In this study a new method for determination of cadmium in alcohol fuel using Moringa oleifera seeds as a biosorbent in an on-line preconcentration system coupled to flame atomic absorption spectrometry (FAAS) was developed. Flow and chemical variables of the proposed system were optimized through multivariate designs. The limit of detection for cadmium was 5.50 μg L−1 and the precision was below 2.3% (35.0 μg L−1, n = 9). The analytical curve was linear from 5 to 150 μg L−1, with a correlation coefficient of 0.9993. The developed method was successfully applied to spiked alcohol fuel, and accuracy was assessed through recovery tests, with recovery ranging from 97.50 to 100%. |
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Keywords: | Cadmium Fuel alcohol Moringa oleifera seeds Solid phase extraction On-line preconcentration Multivariate design |
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