Simultaneous determination of Cd and Pb in antibiotics used in sugar-cane fermentation process by GFAAS
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| Format: | Artículo científico |
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Universidade Estadual Paulista Júlio de Mesquita Filho
2006
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| _version_ | 1876442960484106240 |
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| author | V. R. Amorim |
| author_facet | V. R. Amorim |
| contents | Simultaneous determination of Cd and Pb in antibiotics used in sugar-cane fermentation process by GFAAS V. R. Amorim W. L. Polito S. R. Oliveira G. P. G. Freschi J. A. Gomes Química lead GFAAS cadmium antibiotic permanent modifier A method has been developed for the simultaneous determination of Cd and Pb in antibioticsused in sugar-cane fermentation by GFAAS. The integrated platform of transversely heated graphiteatomizer was treated with tungsten to form a coating of tungsten carbide. Six samples of commercial solidantibiotics were analyzed by injecting 20 µL of digested samples into the pretreated graphite platformwith co-injection of 5 µL of 1000 mg L-1 Pd as chemical modifier. Samples were mineralized in a closedvesselmicrowave-assisted acid-digestion system using nitric acid plus hydrogen peroxide. The pyrolysisand atomization temperatures of the heating program of the atomizer were selected as 600°C and 2200°C,respectively. The calculated characteristic mass for Cd and Pb was 1.6 pg and 42 pg, respectively. Limitsof detection (LOD) based on integrated absorbance were 0.02 µg L-1 Cd and 0.7 µg L-1 Pb and the relativestandard deviations (n = 10) for Cd and Pb were 5.7% and 8.0%, respectively. The recoveries of Cdand Pb added to the digested samples varied from 91% to 125% (Cd) and 80% to 112% (Pb). 2006 artículo científico 0100-4670 https://www.redalyc.org/articulo.oa?id=42931201 en http://www.redalyc.org/revista.oa?id=429 Eclética Química application/pdf Universidade Estadual Paulista Júlio de Mesquita Filho Eclética Química (Brasil) Num.2 Vol.31 |
| format | Artículo científico |
| id | redalyc_42931201 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Universidade Estadual Paulista Júlio de Mesquita Filho |
| spellingShingle | Simultaneous determination of Cd and Pb in antibiotics used in sugar-cane fermentation process by GFAAS V. R. Amorim Química lead GFAAS cadmium antibiotic permanent modifier Simultaneous determination of Cd and Pb in antibiotics used in sugar-cane fermentation process by GFAAS V. R. Amorim W. L. Polito S. R. Oliveira G. P. G. Freschi J. A. Gomes Química lead GFAAS cadmium antibiotic permanent modifier A method has been developed for the simultaneous determination of Cd and Pb in antibioticsused in sugar-cane fermentation by GFAAS. The integrated platform of transversely heated graphiteatomizer was treated with tungsten to form a coating of tungsten carbide. Six samples of commercial solidantibiotics were analyzed by injecting 20 µL of digested samples into the pretreated graphite platformwith co-injection of 5 µL of 1000 mg L-1 Pd as chemical modifier. Samples were mineralized in a closedvesselmicrowave-assisted acid-digestion system using nitric acid plus hydrogen peroxide. The pyrolysisand atomization temperatures of the heating program of the atomizer were selected as 600°C and 2200°C,respectively. The calculated characteristic mass for Cd and Pb was 1.6 pg and 42 pg, respectively. Limitsof detection (LOD) based on integrated absorbance were 0.02 µg L-1 Cd and 0.7 µg L-1 Pb and the relativestandard deviations (n = 10) for Cd and Pb were 5.7% and 8.0%, respectively. The recoveries of Cdand Pb added to the digested samples varied from 91% to 125% (Cd) and 80% to 112% (Pb). 2006 artículo científico 0100-4670 https://www.redalyc.org/articulo.oa?id=42931201 en http://www.redalyc.org/revista.oa?id=429 Eclética Química application/pdf Universidade Estadual Paulista Júlio de Mesquita Filho Eclética Química (Brasil) Num.2 Vol.31 |
| title | Simultaneous determination of Cd and Pb in antibiotics used in sugar-cane fermentation process by GFAAS |
| topic | Química lead GFAAS cadmium antibiotic permanent modifier |
| url | https://www.redalyc.org/articulo.oa?id=42931201 |