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Flow-injection flame atomic absorption spectrometry for slurry atomization. Determination of calcium, magensium, iron, zinc and manganese in vegetables

✍ Scribed by P. Viñas; N. Campillo; I. López García; M. Hernández Córdoba

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
738 KB
Volume
283
Category
Article
ISSN
0003-2670

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✦ Synopsis

A flame atomic absorption spectrometric procedure for determining the iron, zinc, manganese, calcium and magnesium contents of slurries prepared from vegetables is described. Samples were first submitted to a mild calcination step and then suspensions were prepared and introduced into an air-acetylene flame using a simple flow-injection manifold. The calibration for iron, zinc and manganese was carried out using either aqueous standards or a flow-injection sample-to-standard additions method applicable to suspensions. The calcium and magnesium contents were too high for the direct introduction of the slurries into the flame and so an on-line dilution system was used. Excellent agreement was found between the results of the slurry-based procedures and those obtained by an alternative method involving calcination and dissolution in acid. The reliability of the approach was confirmed by analysing two certified reference materials.

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