Infra-red heating as an alternative technique for fast sample preparation
A procedure for sample preparation was investigated in this work using infra-red radiation generated by tungsten lamps for fast heating of an acidic sample suspension contained in a glass flask. The main advantages of the developed procedure are its simplicity and low-cost. Additionally the dilute acid solution is heated in less than 60 s and the total sample preparation is performed in less than 5 min. The proposed procedure is suitable for trace analysis and it can be easily implemented. The preliminary investigations focus on the determination of Cu, Fe, Mn, and Zn in bovine liver and apple leaves as standard reference materials. All results are in agreement at a 95% confidence level. Copper and Mn were also determined in a sample of bovine liver without any sample pretreatment or after a freeze-drying step for comparison. For this sample, the results were validated using a conventional microwave-assisted closed vessel procedure.
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Sociedade Brasileira de Química
2000
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oai:scielo:S0103-505320000003000112000-11-06Infra-red heating as an alternative technique for fast sample preparationGouveia,Sandro T.Fatibello-Filho,OrlandoNóbrega,Joaquim A. Infra-red heating sample preparation infra-red radiation sample decomposition A procedure for sample preparation was investigated in this work using infra-red radiation generated by tungsten lamps for fast heating of an acidic sample suspension contained in a glass flask. The main advantages of the developed procedure are its simplicity and low-cost. Additionally the dilute acid solution is heated in less than 60 s and the total sample preparation is performed in less than 5 min. The proposed procedure is suitable for trace analysis and it can be easily implemented. The preliminary investigations focus on the determination of Cu, Fe, Mn, and Zn in bovine liver and apple leaves as standard reference materials. All results are in agreement at a 95% confidence level. Copper and Mn were also determined in a sample of bovine liver without any sample pretreatment or after a freeze-drying step for comparison. For this sample, the results were validated using a conventional microwave-assisted closed vessel procedure.info:eu-repo/semantics/openAccessSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society v.11 n.3 20002000-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000300011en10.1590/S0103-50532000000300011 |
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| author |
Gouveia,Sandro T. Fatibello-Filho,Orlando Nóbrega,Joaquim A. |
| spellingShingle |
Gouveia,Sandro T. Fatibello-Filho,Orlando Nóbrega,Joaquim A. Infra-red heating as an alternative technique for fast sample preparation |
| author_facet |
Gouveia,Sandro T. Fatibello-Filho,Orlando Nóbrega,Joaquim A. |
| author_sort |
Gouveia,Sandro T. |
| title |
Infra-red heating as an alternative technique for fast sample preparation |
| title_short |
Infra-red heating as an alternative technique for fast sample preparation |
| title_full |
Infra-red heating as an alternative technique for fast sample preparation |
| title_fullStr |
Infra-red heating as an alternative technique for fast sample preparation |
| title_full_unstemmed |
Infra-red heating as an alternative technique for fast sample preparation |
| title_sort |
infra-red heating as an alternative technique for fast sample preparation |
| description |
A procedure for sample preparation was investigated in this work using infra-red radiation generated by tungsten lamps for fast heating of an acidic sample suspension contained in a glass flask. The main advantages of the developed procedure are its simplicity and low-cost. Additionally the dilute acid solution is heated in less than 60 s and the total sample preparation is performed in less than 5 min. The proposed procedure is suitable for trace analysis and it can be easily implemented. The preliminary investigations focus on the determination of Cu, Fe, Mn, and Zn in bovine liver and apple leaves as standard reference materials. All results are in agreement at a 95% confidence level. Copper and Mn were also determined in a sample of bovine liver without any sample pretreatment or after a freeze-drying step for comparison. For this sample, the results were validated using a conventional microwave-assisted closed vessel procedure. |
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Sociedade Brasileira de Química |
| publishDate |
2000 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000300011 |
| work_keys_str_mv |
AT gouveiasandrot infraredheatingasanalternativetechniqueforfastsamplepreparation AT fatibellofilhoorlando infraredheatingasanalternativetechniqueforfastsamplepreparation AT nobregajoaquima infraredheatingasanalternativetechniqueforfastsamplepreparation |
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1756403131702312960 |