MULTI-ELEMENT DETERMINATION OF CALCIUM, POTASSIUM AND MAGNESIUM IN MEDICINAL PLANT BY HIGH-RESOLUTION CONTINUUM SOURCE ATOMIC ABSORPTION SPECTROMETRY

Made available in DSpace on 2022-04-30T07:05:10Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-01-01 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. Instituto de Química Universidade Estadual Paulista, CP 355 Faculdade de Ciências Exatas e Tecnologia Universidade Federal da Grande Dourados, CP 533 Instituto de Química Universidade Estadual Paulista, CP 355