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\hypersetup{pdftitle={Cadmium, Lead and Copper Determination in Soft Drinks \mbox{by DP"=ASV}},pdfauthor={Juliet Ordoukhanian, Fahime Esmaeili},pdfsubject={Tropentag 2010: Abstract},pdfkeywords={Cadmium, copper, DP-ASV, heavy metals, lead, soft drinks},pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 14-16, 2010, Zurich}}\\[1ex] \Large{``World Food System  ---\\A Contribution from Europe''\\[2ex]}}
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\Large{\textbf{Cadmium, Lead and Copper Determination in Soft Drinks \mbox{by DP"=ASV}\footnote{\textbf{Contact Address:} Juliet Ordoukhanian, Payame Noor University, Chemistry, Motahari Ave. Fajr St. Madaiene St. Pnu, 1588765633~Tehran, Iran, \mbox{e-mail}: \email{j.ordoukhanian@yahoo.com}}\\[0.8ex]}}
\normalsize{\textsc{Juliet Ordoukhanian, Fahime Esmaeili}}
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\begin{itemize*}
\item[]{\small{\textit{Payame Noor University, Chemistry, Iran}}}
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\index[author]{Ordoukhanian, Juliet}
\index[author]{Esmaeili, Fahime}
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\textbf{Abstract}
\begin{abstract}
\normalsize{
Heavy metals are very poisonous and have harmful effect on human health. They can be caused cancer and other serious diseases and because of their probable presence in raw materials of foods, their accurate measuring is needed in them. In this paper we have tried to measure heavy metals in soft drinks with a simple method. Determinations of heavy metal ions of beverages usually have done by different electrochemical methods like voltammetery or spectrometric methods most often graphite furnace Atomic Absorption Spectroscopy and ICP-MS which are more complex and most expensive methods.



To investigate the content of some heavy metal ions in bottled or canned soft drinks, we measure the cadmium, lead and copper amounts by the rapid and accurate method of Differential Pulse Polarography with Anodic Stripping Voltammetery on HMDE working electrode using Ag/AgCl, KCl 3M reference electrode. There is no need to any separation pretreatments and the test is done just on the solution of drinks. 



Six different samples of nonalcoholic beer and fruit juices in paper package, glass bottled and aluminum canned from Iranian suppliers were examined. After adjusting the pH of the sample solutions in pH=4.6 with sodium acetate buffer and adding KCl 3M as supporting electrolyte, standard addition method were used. After sweeping the potential in the range of +300 to -700 mv, three separate peaks of ions with each individual Ep can be seen in one polarogram. All samples except one did not show trace amounts of Pb and Cu ions, but all of them contain Cd ion in the level of 0.012 "= 2.0 ppb.







}

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\noindent \textbf{Keywords:} Cadmium, copper, DP-ASV, heavy metals, lead, soft drinks
\index[key]{Cadmium}
\index[key]{Copper}
\index[key]{DP-ASV}
\index[key]{Heavy metals}
\index[key]{Lead}
\index[key]{Soft drinks}
\end{document}