CHEMICAL COMPOSITION OF SOME SELECTED FRUIT PEELS
IF with an air-acetylene flame, and wavelength respectively set to 422.7 nm for calcium, 279.5 nm for manganese, 248.3 nm for iron and 213.9 nm for zinc determination was used. Stock solutions (1000 ppm) of calcium, manganese, iron and zinc were used to prepare working standard solutions with at least 4 concentrations within the analytical range.
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