Determinação espectrofotometrica de boro em plantas com azometina-H, usando analise em fluxo continuo monossegmentado

AUTOR(ES)

Monica Ferreira

DATA DE PUBLICAÇÃO

1987

RESUMO

A monosegmented continuous flow analysis (MCFA) procedure for the spectrophotometric determination of boron using azornethine-H as colar reagente is presented. Under the experimental conditions described the analytical curve is linear up to 4.00 mg ml. The detection limit found is 0.02 mg ml, calculated frorn three times the standard deviation of the blank signal. As the injection cycle is completed in 30s, the atual sampling rate is 120h. The common interfering elements present in plants were investigated under the dynamic MCFA conditions. As expected, iron and copper present the most severe interferences. This MCFA method for boron determination was used with test samples from the Plant Sample Exchange Prograrnrne (PSEP) of the Wageningen Agricultural University. The results compared favourably with those obtained by the conventional static procedure as well as those published by the PSEP.

ASSUNTO(S)

plantas - efeito do boro espectrofotometria

Documentos Relacionados

• Determinação catalitica de molibdenio em plantas, usando analise em fluxo continuo monossegmentado com detecção espectrofotometrica
• Sistema fluxo-batelada monossegmentado: determinação espectrofotométrica de boro em plantas.
• Interferência de ferro na dosagem de boro no solo com azometina-H em soluções extratoras ácidas.
• Interferência de ferro na dosagem de boro no solo com azometina-H em soluções extratoras ácidas
• Decomposição de resíduo laboratorial contendo azometina-H.