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Registro Completo |
Biblioteca(s): |
Embrapa Pecuária Sudeste. |
Data corrente: |
16/02/2005 |
Data da última atualização: |
06/05/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
NASCENTES, C. C.; ARRUDA, M. A. Z.; NOGUEIRA, A. R. de A.; NÓBREGA, J. A. |
Afiliação: |
CLÉSIA C. NASCENTES, UFSCar, SÃO CARLOS, SP.; MARCO A. Z. ARRUDA, Universidade Estadual de Campinas, Campinas, SP.; ANA RITA DE ARAUJO NOGUEIRA, CPPSE; JOAQUIM A. NÓBREGA, UFSCar, SÃO CARLOS, SP. |
Título: |
Direct determination of Cu and Zn in fruit juices and bovine milk by thermospray flame furnace atomic absorption spectrometry. |
Ano de publicação: |
2004 |
Fonte/Imprenta: |
Talanta, v.64, n.4, p.912-917, nov. 2004. |
DOI: |
https://doi.org/10.1016/j.talanta.2004.04.004 |
Idioma: |
Inglês |
Conteúdo: |
In the present work, thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) was employed for Cu and Zn determination in bovine milk and fruit juice samples without any pretreatment. TS-FF-AAS system was optimized and a sample volume of 300 ?l was injected into the carrier stream (0.014 mol l?1 HNO3 at a flow rate of 0.4 ml min?1), and it was introduced into a hot Ni tube. The detection limits obtained for Cu and Zn in aqueous solution were 2.2 and 0.91 ?g l?1, respectively, and 3.2 ?g l?1 for Cu in a medium containing water-soluble tertiary amines. The relative standard deviations varied from 2.7 to 4.2% (n=12). Sample preparation was carried out by simple dilution in water or in water-soluble tertiary amines medium. Accuracy was checked by performing addition-recovery experiments as well as by using reference materials (whole milk powder, non-fat milk powder, and infant formula). Recoveries varied from 97.7 to 105.3% for Cu and Zn. All results obtained for reference materials were in agreement with certified values at a 95% confidence level. |
Palavras-Chave: |
Cu; FAAS; Flame furnace; Thermospray; Zn. |
Thesaurus Nal: |
Fruit juices; Milk. |
Categoria do assunto: |
W Química e Física |
Marc: |
LEADER 01826naa a2200253 a 4500 001 1046992 005 2022-05-06 008 2004 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.talanta.2004.04.004$2DOI 100 1 $aNASCENTES, C. C. 245 $aDirect determination of Cu and Zn in fruit juices and bovine milk by thermospray flame furnace atomic absorption spectrometry.$h[electronic resource] 260 $c2004 520 $aIn the present work, thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS) was employed for Cu and Zn determination in bovine milk and fruit juice samples without any pretreatment. TS-FF-AAS system was optimized and a sample volume of 300 ?l was injected into the carrier stream (0.014 mol l?1 HNO3 at a flow rate of 0.4 ml min?1), and it was introduced into a hot Ni tube. The detection limits obtained for Cu and Zn in aqueous solution were 2.2 and 0.91 ?g l?1, respectively, and 3.2 ?g l?1 for Cu in a medium containing water-soluble tertiary amines. The relative standard deviations varied from 2.7 to 4.2% (n=12). Sample preparation was carried out by simple dilution in water or in water-soluble tertiary amines medium. Accuracy was checked by performing addition-recovery experiments as well as by using reference materials (whole milk powder, non-fat milk powder, and infant formula). Recoveries varied from 97.7 to 105.3% for Cu and Zn. All results obtained for reference materials were in agreement with certified values at a 95% confidence level. 650 $aFruit juices 650 $aMilk 653 $aCu 653 $aFAAS 653 $aFlame furnace 653 $aThermospray 653 $aZn 700 1 $aARRUDA, M. A. Z. 700 1 $aNOGUEIRA, A. R. de A. 700 1 $aNÓBREGA, J. A. 773 $tTalanta$gv.64, n.4, p.912-917, nov. 2004.
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Embrapa Pecuária Sudeste (CPPSE) |
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Registro Completo
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
01/09/2011 |
Data da última atualização: |
11/11/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - A |
Autoria: |
NEPSTAD, D. C.; MOUTINHO, P.; DIAS-FILHO, M. B.; DAVIDSON, E.; CARDINOT, G.; MARKEWITZ, D.; FIGUEIREDO, R.; VIANNA, N.; CHAMBERD, J.; RAY, D.; GUERREIROS, J. B.; LEFEBVRE, P.; STERNBERG, L.; MOREIRA, M.; BARROS, L.; ISHIDA, F. Y.; TOHLVER, I.; BELK, E.; KALIF, K.; SCHWALBE, K. |
Afiliação: |
WOODS HOLE RESEARCH CENTER / INPA; INPA; MOACYR BERNARDINO DIAS FILHO, CPATU; WOODS HOLE RESEARCH CENTER; INPA; UNIVERSITY OF GEORGIA; INPA; NOEMI VIANNA MARTINS LEAO, CPATU; UNIVERSITY OF CALIFORNIA; WOODS HOLE RESEARCH CENTER; INPA; WOODS HOLE RESEARCH CENTER; UNIVERSITY OF MIAMI; CENA/USP; INPA; INPA; INPA; WOODS HOLE RESEARCH CENTER; INPA; WOODS HOLE RESEARCH CENTER. |
Título: |
The effects of partial throughfall exclusion on canopy processes, aboveground production, and biogeochemistry of an Amazon forest. |
Ano de publicação: |
2002 |
Fonte/Imprenta: |
Journal of Geophysical Research, v. 107, n. D20, 2002. |
DOI: |
10.1029/2001JD000360 |
Idioma: |
Inglês |
Palavras-Chave: |
Biogeoquímica; Mudança global. |
Thesagro: |
Biomassa; Floresta. |
Thesaurus NAL: |
Amazonia. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01143naa a2200409 a 4500 001 1899417 005 2022-11-11 008 2002 bl uuuu u00u1 u #d 024 7 $a10.1029/2001JD000360$2DOI 100 1 $aNEPSTAD, D. C. 245 $aThe effects of partial throughfall exclusion on canopy processes, aboveground production, and biogeochemistry of an Amazon forest.$h[electronic resource] 260 $c2002 650 $aAmazonia 650 $aBiomassa 650 $aFloresta 653 $aBiogeoquímica 653 $aMudança global 700 1 $aMOUTINHO, P. 700 1 $aDIAS-FILHO, M. B. 700 1 $aDAVIDSON, E. 700 1 $aCARDINOT, G. 700 1 $aMARKEWITZ, D. 700 1 $aFIGUEIREDO, R. 700 1 $aVIANNA, N. 700 1 $aCHAMBERD, J. 700 1 $aRAY, D. 700 1 $aGUERREIROS, J. B. 700 1 $aLEFEBVRE, P. 700 1 $aSTERNBERG, L. 700 1 $aMOREIRA, M. 700 1 $aBARROS, L. 700 1 $aISHIDA, F. Y. 700 1 $aTOHLVER, I. 700 1 $aBELK, E. 700 1 $aKALIF, K. 700 1 $aSCHWALBE, K. 773 $tJournal of Geophysical Research$gv. 107, n. D20, 2002.
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