Multi-element determination of calcium, potassium and magnesium in medicinal plant by high-resolution continuum source atomic absorption spectrometry
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Keywords

Macronutrients
Medicinal plants
HR-CS FAAS

How to Cite

Silva, T. V., Rêgo, J. F., de Moraes, M., Cavalheiro, A. J., Gomes Neto, J. A., & Raposo Júnior, J. L. (2014). Multi-element determination of calcium, potassium and magnesium in medicinal plant by high-resolution continuum source atomic absorption spectrometry. Eclética Química, 37(1), 45–50. https://doi.org/10.26850/1678-4618eqj.v37.1.2012.p45-50

Abstract

A simple and rugged method to determine Ca, K and Mg in a single aliquot of medicinal plants by high-resolution continuum source flame atomic absorption spectrometry is proposed. Secondary lines for Ca (239.856 nm) and K (404.414 nm), and the alternate line measured at wing of the secondary line for Mg at 202.588 nm allowed calibration within the 20 – 500 mg L-1 Ca and K, and 1.0 – 80 mg L-1 Mg. Twenty samples and three plant certified materials were analyzed. Results were in agreement at a 95% confidence level with reference values. Limits of detection were 2.4 mg L-1 Ca, 1.9 mg L-1 K and 0.3 mg L-1 Mg. The RSD (n=12) were ≤ 5.1% and recoveries were between 83 and 108% for all analytes.

https://doi.org/10.26850/1678-4618eqj.v37.1.2012.p45-50
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