DETERMINAÇÃO DE METAIS POR TÉCNICAS DE ESPECTROMETRIA ATÔMICA EM AMOSTRAS DE CARVÃO MINERAL E CINZAS UTILIZANDO METODOLOGIA DE SUPERFÍCIE DE RESPOSTA
This paper describes the method optimization using response surface methodology for Cu, Fe, Zn and Na determinations in coal and ash samples by spectrometry techniques. The sample preparation was performed using a recirculation system adapted in the digestion tubes. This system allowed increase of t...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
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| Series: | Química Nova |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422016000800936&lng=en&tlng=en |
| _version_ | 1819267792409460736 |
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| author | Camila M. Oliz Emanoelli R. Lopes Aline L. Medina Anderson S. Ribeiro Adriane M. Nunes |
| author_facet | Camila M. Oliz Emanoelli R. Lopes Aline L. Medina Anderson S. Ribeiro Adriane M. Nunes |
| author_sort | Camila M. Oliz |
| collection | DOAJ |
| description | This paper describes the method optimization using response surface methodology for Cu, Fe, Zn and Na determinations in coal and ash samples by spectrometry techniques. The sample preparation was performed using a recirculation system adapted in the digestion tubes. This system allowed increase of temperature in the digester block above the boiling point of the reaction medium, avoiding acid evaporation during the heating. The digestions were realized with HNO3 and H2O2 for 1 h in a digester block at 145 °C. The limits of detection for determination of Cu, Fe, Zn and Na in both samples were satisfactory. The RSD for the analytes were lower than 6.0%. Statistical tests showed that results for all analytes do not vary significantly with official method (ASTM), considering a confidence limit of 95%. Besides, the accuracy was verified by recovery tests, whose values ranged from 92.7 to 104.7% in coal, and 98.7 to 115.3% in ash. |
| first_indexed | 2024-12-23T21:22:48Z |
| format | Article |
| id | doaj.art-90bc054e0cce4ff9b86c0905f3c10c8f |
| institution | Directory Open Access Journal |
| issn | 1678-7064 |
| language | English |
| last_indexed | 2024-12-23T21:22:48Z |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-90bc054e0cce4ff9b86c0905f3c10c8f2022-12-21T17:30:42ZengSociedade Brasileira de QuímicaQuímica Nova1678-706439893694310.21577/0100-4042.20160120S0100-40422016000800936DETERMINAÇÃO DE METAIS POR TÉCNICAS DE ESPECTROMETRIA ATÔMICA EM AMOSTRAS DE CARVÃO MINERAL E CINZAS UTILIZANDO METODOLOGIA DE SUPERFÍCIE DE RESPOSTACamila M. OlizEmanoelli R. LopesAline L. MedinaAnderson S. RibeiroAdriane M. NunesThis paper describes the method optimization using response surface methodology for Cu, Fe, Zn and Na determinations in coal and ash samples by spectrometry techniques. The sample preparation was performed using a recirculation system adapted in the digestion tubes. This system allowed increase of temperature in the digester block above the boiling point of the reaction medium, avoiding acid evaporation during the heating. The digestions were realized with HNO3 and H2O2 for 1 h in a digester block at 145 °C. The limits of detection for determination of Cu, Fe, Zn and Na in both samples were satisfactory. The RSD for the analytes were lower than 6.0%. Statistical tests showed that results for all analytes do not vary significantly with official method (ASTM), considering a confidence limit of 95%. Besides, the accuracy was verified by recovery tests, whose values ranged from 92.7 to 104.7% in coal, and 98.7 to 115.3% in ash.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422016000800936&lng=en&tlng=encoalashmetalsatomic spectrometryvalidation |
| spellingShingle | Camila M. Oliz Emanoelli R. Lopes Aline L. Medina Anderson S. Ribeiro Adriane M. Nunes DETERMINAÇÃO DE METAIS POR TÉCNICAS DE ESPECTROMETRIA ATÔMICA EM AMOSTRAS DE CARVÃO MINERAL E CINZAS UTILIZANDO METODOLOGIA DE SUPERFÍCIE DE RESPOSTA Química Nova coal ash metals atomic spectrometry validation |
| title | DETERMINAÇÃO DE METAIS POR TÉCNICAS DE ESPECTROMETRIA ATÔMICA EM AMOSTRAS DE CARVÃO MINERAL E CINZAS UTILIZANDO METODOLOGIA DE SUPERFÍCIE DE RESPOSTA |
| title_full | DETERMINAÇÃO DE METAIS POR TÉCNICAS DE ESPECTROMETRIA ATÔMICA EM AMOSTRAS DE CARVÃO MINERAL E CINZAS UTILIZANDO METODOLOGIA DE SUPERFÍCIE DE RESPOSTA |
| title_fullStr | DETERMINAÇÃO DE METAIS POR TÉCNICAS DE ESPECTROMETRIA ATÔMICA EM AMOSTRAS DE CARVÃO MINERAL E CINZAS UTILIZANDO METODOLOGIA DE SUPERFÍCIE DE RESPOSTA |
| title_full_unstemmed | DETERMINAÇÃO DE METAIS POR TÉCNICAS DE ESPECTROMETRIA ATÔMICA EM AMOSTRAS DE CARVÃO MINERAL E CINZAS UTILIZANDO METODOLOGIA DE SUPERFÍCIE DE RESPOSTA |
| title_short | DETERMINAÇÃO DE METAIS POR TÉCNICAS DE ESPECTROMETRIA ATÔMICA EM AMOSTRAS DE CARVÃO MINERAL E CINZAS UTILIZANDO METODOLOGIA DE SUPERFÍCIE DE RESPOSTA |
| title_sort | determinacao de metais por tecnicas de espectrometria atomica em amostras de carvao mineral e cinzas utilizando metodologia de superficie de resposta |
| topic | coal ash metals atomic spectrometry validation |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422016000800936&lng=en&tlng=en |
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