Data/hora: 09/06/2024 07:49:01

Biblioteca(s): | Embrapa Pecuária Sudeste.
Data corrente: | 16/02/2005
Data da última atualização: | 06/05/2022
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
Registro original: | Embrapa Pecuária Sudeste (CPPSE)
Exemplares: | CPPSE - (15444-1) - UPC - AP - DD - PROCI-2004.00170 - NAS - 2004.00170 - DIS