Determinação e especiação de elementos traço em plantas medicinais comercializadas na cidade de Belém-PA.

Abstract

This study presents the determination of Ca, Cu, Fe, Mg, Mn and Zn in ten medicinal herbs form the Amazon, pariri (Arrabidaea chica), aroeira (Schinus terebinthifolia), insulina (Cissus sicyoides), unha de gato (Uncaria tomentosa), graviola (Annona muricata), peão branco (Jatropha curcas), malva branca (Sida cryphiopetala), lacre (Vismia guianensis), perpétua roxa (Gomphrena globosa) e vinagreira roxa (Hibiscus sabdariffa),marketed in the city of Belém-PA. The samples were digested with HNO;3 and HzO, in block digester and tea were made with deionized water boiling, samples were analyzed by FAAS and the accuracy was evaluated with certified reference material GBW07604, the results were interpreted with the aid of PCA and HCA, which mat it possible to highlighted the high correlation between Cu and Fe and also between Ca, Mg, Mn and Zn. In the sample digested the levels ranged from 1.9-26.3% for Ca, 4.0-10.6 ug g”' of Cu, 99.1-345.2 ug g” of Fe, 0.14-1.6% of Mg, 9.6- 154.7 ug &"* of Mn and 9.4-216.2 ug g” of Zn. In teas, levels ranged from 0.33-2.4% for Ca, 0.5-2.1 ug g of Cu, 1.5-30.2 ug g' of Fe, 0.03-0.95% of Mg, 2.9-49.1 ug g' of Mn and 1.2- 60.7 ug g” of Zn. insulina, graviola, peão branco e fruta pão (Artocarpus altilis) are medicinal herbs used in the treatment of diabetes. Was evaluated the content of Cr (VI) in these samples. The methodology extracted Cr (VI) from the leaves of these herbs with Na;CO; and then was analyzed by GF AAS together with their digested, they suffered the opening process in the microwave with the aid of HNO; 50% (v/v) and H2O, under conditions previously evaluated and adjusted. The samples tested showed no risks of contamination of Cr (VD) to its consumers. Cr levels ranged between from 733.26-2449.29 ug kg" in digested, 46.20-363.78 ug kg"! for Cr (VI) total and 41.09-309.03 ug kg" for Cr (VI) in water soluble. A method for extraction of Fe”* by cloud point using APDC as complexing was optimized in order to find the condition which that the maximum amount of Fe?” and the minimum amount of Fe” later this condition was tested in six samples of medicinal herbs from Amazon Pariri, Insulina, Unha de gato, Graviola, Peão branco e Vinagreira roxa and in five of them was not detected Fe””, only a sample of Vinagreira roxa which showed 5.34 ug gg of Fe”.