Quantificação de espécies metálicas em Abacate (Persea americana Mill), Mamão (Carica papaya L.), Tomate (Lycopersicum esculentum Mill), Cupuaçu (Theobroma grandiflorum Schum), Dão (Ziziphus mauritiana Lam), Ingá (Inga edulis Mart), Tamarindo (Tamarindus indica L), solo e água

Abstract

The metallic species are of great importance in order to know the concentration of metals in various matrices checking its availability in soil, water and fruit pulps studied and can therefore identify their potential of storage nutrients in areas related to matrices which are here studied . It was applied a method of treatment of samples, calcination (CA) for quantification of K, Na and Li by flame photometry (FOC) and Ca, Cu, Fe, Mn, Ni and Zn Absorption by Atomic Spectrometry flame (FAAS), in samples of avocado (Persea americana Mill), papaya (Carica papaya L.), tomato (Lycopersicum esculentum Mill), cupuaçu (Theobroma grandiflorum Schum), (Ziziphus mauritiana Lam), Inga (Inga edulis Mart) , tamarindo (Tamarindus indica L), and soil and water in those regions where there were these matrices in different periods called dry and rainy. The method of CA proved to be efficient, accurate, simple and accurate for all metal species in the sample under study with relative standard deviations below 10%, and recoveries in the range of 90 to 110%. The levels of K, Na , Li , Ca, Cu, Fe, Mn, Ni and Zn show limits of quantification (LOQs) optimal or acceptable in the method of (CA) for all samples discussed in this study. Statistical tests, F e t paired (95 % confidence) applied to the results of the method (CA) show mostly comparisons that there are significant differences between their accuracy and concentrations in all species, as well as between samples studied in different periods called dry and rainy. Given this, it was necessary to apply statistical analysis PCA and HCA, in order to more accurately assess the statistical results obtained throughout the work. Given this, we can have a conclusion that there is a similarity between the samples through the graphical visualization. The method of CA was found to be effective when checked the quantity of reagent used, manipulation steps and sample contamination. The amount of water from the dry and wet, directly affect the concentration of metal species studied in various matrices, but the fact that a species having a high concentration metal species in the water, not necessarily interferes with the concentration of that species in soil and fruits of this region.