Dependence among total polyphenols content, total antioxidant capacity and heavy metals content in potatoes

<div><div><table style="height: 561px;" border="0" cellspacing="0" cellpadding="0" width="664" align="left"><tbody><tr><td style="padding-top:3.1pt;padding-right: 0cm;padding-bottom:3.1pt;padding-left:0cm" height="561" align="left" valign="top"><div style="mso-element:para-border-div;border:none;border-bottom:solid windowtext 2.25pt; padding:0cm 0cm 1.0pt 0cm"><p style="margin-top:4.8pt;margin-right:0cm;margin-bottom:6.0pt;margin-left: 0cm;text-align:justify;text-justify:inter-ideograph;line-height:115%; border:none;mso-border-bottom-alt:solid windowtext 2.25pt;padding:0cm; mso-padding-alt:0cm 0cm 1.0pt 0cm;mso-element:frame;mso-element-frame-width: 498.1pt;mso-element-frame-height:414.8pt;mso-element-frame-vspace:3.1pt; mso-element-wrap:around;mso-element-anchor-vertical:page;mso-element-anchor-horizontal: page;mso-element-left:49.65pt;mso-element-top:57.5pt;mso-height-rule:exactly"><span><span style="font-size: 10pt; line-height: 115%;" lang="EN-GB">Polyphenols belong to the most significant compounds with antioxidant effects in potatoes. Their content depends on several factors. The most important factor is the variety of potatoes and the conditions of their growing such as temperature, rainfall, altitude, agronomic and chemical characteristics of the soil. We have compared two potato cultivars in the study which have been grown in the Slovak localities Doln&eacute; Obdokovce and Vrbov&aacute; nad V&aacute;hom (cv. Agria) and Nitra, Rado&scaron;ina and Vrbov&aacute; nad V&aacute;hom (cv. Impala). In lyophilized samples of potatoes total polyphenols content in ethanolic extracts using Folin-Ciocalteu agens and in methanolic extracts total antioxidant capacity using DPPH</span></span><span><span style="font-size: 10pt; line-height: 115%; font-family: Wingdings;" lang="EN-GB"></span></span><span><span style="font-size: 10pt; line-height: 115%;" lang="EN-GB"> were spectrophotometrically determined. The average total polyphenols content in the potato variety Impala was 604.26 &plusmn;120.70 mg.kg^-1 dry matter (DM) and 529.37 &plusmn;59.35 mg.kg^-1 DM in the variety Agria. The average value of total antioxidant capacity, expressed in % inhibition, was 8.44 &plusmn;1.68% in the potato variety Impala and 8.09 &plusmn;1.14% in Agria. The results obtained were evaluated by One-way analysis of variance ANOVA (LSD-test), using Statistical Analysis Software Statgraphics. Mutual correlations among the total polyphenols content, total antioxidant capacity and heavy metals concent (Pb, Ni, Cd - </span></span><span style="font-size:10.0pt;line-height: 115%;mso-ansi-language:EN-GB" lang="EN-GB">determined using atomic absorption spectrometry (AAS) method: Cd, Pb: GF-AAS and Ni F-AAS<span>) were evaluated using the correlation and regression analysis (Microsoft Excel). Statistically significant interdependence (<em>p</em> &lt;0.05) was only confirmed between the Cd content and total antioxidant capacity in both cultivars, or between the Ni content and total antioxidant capacity in the variety Impala</span>.</span></p></div></td></tr></tbody></table></div></div> <!--[endif] -->