CONICET | Buscador de Institutos y Recursos Humanos

&amp;amp;amp;lt;!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-1610611985 1107304683 0 0 159 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif"; mso-fareast-font-family:"Times New Roman"; mso-ansi-language:ES-AR; mso-fareast-language:ES;} .MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt;} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 72.0pt 72.0pt 72.0pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} /* List Definitions */ @list l0 {mso-list-id:1485973092; mso-list-type:hybrid; mso-list-template-ids:1296487034 1254105766 67764249 67764251 67764239 67764249 67764251 67764239 67764249 67764251;} @list l0:level1 {mso-level-tab-stop:36.0pt; mso-level-number-position:left; text-indent:-18.0pt; mso-ansi-font-size:12.0pt; mso-bidi-font-size:12.0pt; font-family:"Times New Roman","serif"; mso-ansi-font-weight:normal; mso-ansi-font-style:normal;} ol {margin-bottom:0cm;} ul {margin-bottom:0cm;} --&amp;amp;amp;gt;   Human activity such as industrial development, urbanization and intensive agriculture, has led to extensive environmental problems. Since heavy metals are mobile and easily absorbed by plants in the environment, they are transmitted to the human body through nourishment [1, 2]. Metal-accumulating plants, such Triticum species and Helianthus annuus L., can accumulate high concentrations of heavy metals in both leaves and roots from polluted soil and waters [3]. For the determination of these elements we used CZE with indirect detection. This technique require the dissolution of the sample, with this aim three digestion procedures were applied. The digestion procedures tested were: Procedure 1: batch using a mixture of HNO3+HCl; Procedure 2: microwave (MW)-assisted acid treatment with an acid mixture of HNO3+HCl and Procedure 3: microwave (MW)-assisted acid treatment with H2O2. The samples obtained by the diferent proscedures were inyected to the CE. The detection was performed at 214 nm; the voltage was set at 25 kV. Samples were pressure-injected at the cathodic side at 0.5 psi for 10 seconds. The background electrolyte (BGE) used consisted of 6 mM imidazole, pH 4.0 adjusted with 1 M acetic acid. The best results were acquired when the digestion procedure 1 was applied. The proposed method allows the rapid determination of heavy metals in natural products. It was recently demonstrated that MW-assisted acid treatment with H2O2 could be used satisfactorily for sample clean-up technique prior to CE determination of various metals species. This methods have a great potential to be applied in phytoremediation in which the use of green plants help to remove contaminants from soil and groundwater.