Work

Planejamento fatorial aplicado à digestão de amostras de feijão assistida por radiação microondas

Year: 2006

Type: article

Abstract: BEAN SAMPLES.The use of factorial design was evaluated for optimization of focused-microwave-assisted digestion of bean samples.Calcium, Fe, Mg, Mn and Zn percentual recoveries were determined in digestates after focused-microwave-assisted digestion according to factorial design procedures.A cavity microwave digestion was carried out to certify the elemental compositions obtained.The accuracy was checked using a standard reference material, the NIST SRM 8433 -Corn Bran.Results are in agreement with certified values at the 95% confidence limit when the Student t-test was used.Volumes of nitric and sulfuric acid, temperature, and the interplay between HNO 3 and H 2 SO 4 initial volumes were significant variables according to P-values in the analysis of variance (ANOVA).

Source: Química Nova

DOI: 10.1590/s0100-40422006000100026

Authors: Letícia M. Costa, Maria das Graças A. Korn, Jacira T. Castro, Wagna P. C. Santos, Edivan V. Carvalho, Ana Rita A. Nogueira

Institutions: Universidade Federal da Bahia, Universidade Federal de São Carlos, Embrapa Pecuária Sudeste

Language: Portuguese

Topic: Analytical chemistry methods development

Subfield: Analytical Chemistry

Field: Chemistry

Domain: Physical Sciences

SDG: Zero hunger

Open Access status: gold

Estimated APC paid: $330