The objective of this work was to determine the recovery of metallic ions used as markers of solutions applied to soybean plants. The experiment was carried out under green house conditions. The solutions applied to the plants had in its composition one of the following metallic markers: manganese sulfate, zinc sulfate, copper sulfate, copper hydroxide or copper oxychloryde. The water + metallic marker combinations were applied to the adaxial face of the plant leaflets at 50 and 70 days after seedling emergence and simultaneously over glass laminae. Later on, the markers were extracted from soybean leaflets and the glass laminae with the help of a 0.2 mol L-1 HCl solution and the quantification of the recovered concentration of each ion was accomplished by means of an atomic absorption spectrophotometer. Considering just the extraction method used and the rate of recovery, the markers manganese, copper, and zinc sulfates are adequate for studying pulverization deposits. Copper hydroxide and copper oxychloride are not recommended for such studies since these products either on soybean leaflets or on glass laminae showed lower recovery values when compared to the other markers. In addition to that, the recovery rate values of those markers were more variable.Keywords: application efficiency, spectrophotometry, Glycine max L., analytical methods.

Recovery of metallic markers used to study deposits of the pulverization in soybean plants

248th National Meeting (2014)

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