Study of chromium and nickel content in white asparagus (Asparagus officinalis, L.)
1997
Amaro-Lopez, M.A. | Monero-Rojas, R. | Zurera-Cosano, G.
The modifications in the chromium (Cr) and nickel (Ni) content and the distribution of these trace elements in white asparagus spears were investigated. Samples were taken of two varieties of white asparagus, Desto and Cipres, andgrouped in function of their thickness in spears of 11 mm and of14 mm. All the asparagus samples were cut in lengths of 20 cm and divided into 10 portions of 2 cm each. The determinations of chromium and nickel were carried out by atomic absorption spectrophotometry with air-acetylene flame. By means of three-factor analyses of variance, statisticaly significant differences were determined between the concentrations of chromium and nickel and each one of the sources of variation established. The chromium content showed a variable distribution throughout the white asparagus portions as a result of the notable differences between varieties and thickness. In the case of nickel, its levels underwent a generalized decrease as the spear portions were further and further away from the apical area or tip of the white asparagus.
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