High enhancement of macro and micronutrients quantification in Cajuína by ICP OES using ultrasound and multivariate analysis.

COELHO, T. L. S.; SILVA, D. S. N.; SOUZA FILHO, L. B. DE; ROCHA, J. M.; MARCANO DE HIGUERA, J.; SÁ, I. P. DE; GAMELA, R. R.; NOGUEIRA, A. R. de A.; LOPES JÚNIOR, C. A.; VIEIRA, E. C.

High enhancement of macro and micronutrients quantification in Cajuína by ICP OES using ultrasound and multivariate analysis.

Autores

COELHO, T. L. S.

SILVA, D. S. N.

SOUZA FILHO, L. B. DE

ROCHA, J. M.

MARCANO DE HIGUERA, J.

SÁ, I. P. DE

GAMELA, R. R.

NOGUEIRA, A. R. de A.

LOPES JÚNIOR, C. A.

VIEIRA, E. C.

Descripción

A fast, safe, simple, and low-cost analytical method was developed for the determination of macro and microelements in Cajuína samples from Brazil combining UAE and ICP OES. A multiplexed approach using experimental designs was applied for method optimization. The optimal conditions were using 4 mL of 8 mol L−1 HNO3 and 1.5 mL H2O2 under 30 min of sonication. The detectability of the method has been improved. The precision was RSD < 5.5% while the accuracy of the method ranged from 87% to 108% as well as the results were in agreement with the reference method. The analysis of 38 samples of Cajuína juices presented a mean of Ca, Cu, Fe, K, Mg, Na, P, S and Zn of 8.70, 0.10, 0.97, 1223, 112, 60.1, 83.9, 65.1, and 0.99 mg L−1. So, the proposed analytical method demonstrated feasibility for the simultaneous determination of mineral nutrients in similar matrices as beverage.