Elemental Composition of Vegetables in the Dar es Salaam Market Using Wavelength Dispersive X-Ray Fluorescence Analysis
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Concentrations of several elements were determined in vegetables collected
from the Dar es Salaam City markets by Wavelength Dispersive X-ray
Fluorescence Spectrometry (WDXRF). The method involved taking 1g of
dried and finely grinded vegetables prepared as pellets for analysis.
Vegetables analyzed belong to species of Vigina Unguiculata (Kunde),
Amarathus (African Spinach), Cucuta maxima (Pumpkin), and Brassica
Chinese (Spinach). The WDXRF SRS 300 with Rh anode was operated at
60kV, 5mA and 60kV, 50mA for different range of elemental analysis. In all
the vegetable samples carbon and oxygen were found to dominate with high
concentrations between 32% and 47%. This paper presents results for
elemental concentrations in vegetables that are main meal of any average
Dar es Salaam city resident.
Keywords
Wavelength Dispersive X-ray Fluorescence, Vegetables, Vigina Unguiculata, Amarathus, Cucuta maxima, Brassica Chinese