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

• Autor(a) principal: Silva, Tiago Varão [UNESP]
• Data de Publicação: 2012
• Outros Autores: Rêgo, Jardes Figuerêdo [UNESP], De Moraes, Mercedes [UNESP], Cavalheiro, Alberto José [UNESP], Gomes Neto, José Anchieta [UNESP], Raposo, Jorge Luiz
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.26850/1678-4618eqj.v37.1.2012.p45-50; http://hdl.handle.net/11449/232726
• topic: HR-CS FAAS; Macronutrients; Medicinal plants

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.