<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0872-1904</journal-id>
<journal-title><![CDATA[Portugaliae Electrochimica Acta]]></journal-title>
<abbrev-journal-title><![CDATA[Port. Electrochim. Acta]]></abbrev-journal-title>
<issn>0872-1904</issn>
<publisher>
<publisher-name><![CDATA[Sociedade Portuguesa de Electroquímica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0872-19042021000100045</article-id>
<article-id pub-id-type="doi">10.4152/pea.202101045</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Differential Pulse Adsorptive Cathodic Stripping Voltammetry for the Simultaneous Determination of Pb and Zn in Seawater Using Calcon]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pardi]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Deswati]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Edelwis]]></surname>
<given-names><![CDATA[T. W.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Willian]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fitriyah]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Raja Ali Haji Maritime University Faculty of Teacher Training and Education Department of Chemistry Education]]></institution>
<addr-line><![CDATA[Senggarang Tanjungpinang]]></addr-line>
<country>Indonesia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Andalas University Faculty of Mathematics and Natural Science Department of Chemistry]]></institution>
<addr-line><![CDATA[Padang ]]></addr-line>
<country>Indonesia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>01</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>01</month>
<year>2021</year>
</pub-date>
<volume>39</volume>
<numero>1</numero>
<fpage>45</fpage>
<lpage>57</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0872-19042021000100045&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0872-19042021000100045&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0872-19042021000100045&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract A selective method is presented for the simultaneous determination of Pb and Zn in seawater samples, using Differential Pulse Adsorptive Cathodic Stripping Voltammetry (DPAdCSV). In preliminary studies, it has been proven that Pb and Zn react with calcon, giving rise to the formation of complexes which have adsorptive characteristics with a hanging mercury drop electrode (HMDE) and undergo reduction. The optimum parameters and conditions for determination are investigated. The optimal parameters for DPAdCSV of calcon were found to be 0.3 mol L-1 of acetate buffer, with pH 5, 0.02 mmol L-1 of calcon, adsorptive accumulation potential (Eads) of -0.1 V and adsorptive accumulation duration (tads) of 70 s. Ten replicates were performed, giving RSD values of 1.2% for Pb and 0.4% for Zn. Recovery values were in the range from 98% to 105% for both Pb and Zn. The calibration graphs were linear in the range from 5 to 210 ng mL-1 and 5 to 200 ng mL-1 for Pb and Zn, respectively. The limit of detection (LOD) was 0.01 ng mL-1 for Pb and 0.05 ng mL-1 for Zn. The interference of some common ions was studied and it was concluded that the method could be successfully used to determine the concentration of Pb and Zn in seawater samples.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[selective method]]></kwd>
<kwd lng="en"><![CDATA[Pb and Zn]]></kwd>
<kwd lng="en"><![CDATA[seawater]]></kwd>
<kwd lng="en"><![CDATA[DPAdCSV method]]></kwd>
<kwd lng="en"><![CDATA[calcon.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wan Ngah]]></surname>
<given-names><![CDATA[WS]]></given-names>
</name>
<name>
<surname><![CDATA[Hanafiah]]></surname>
<given-names><![CDATA[MAKM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Removal of heavy metal ions from wastewater by chemically modified plant wastes as adsorbents: A review]]></article-title>
<source><![CDATA[Bioresource Techn]]></source>
<year>2008</year>
<volume>99</volume>
<numero>10</numero>
<issue>10</issue>
<page-range>3935-49</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Abbasi]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Bahiraei]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Abbasi]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A highly sensitive method for simultaneous determination of ultra trace levels of copper and cadmium in food and water samples with luminol as a chelating agent by adsorptive stripping voltammetry]]></article-title>
<source><![CDATA[Food Chem]]></source>
<year>2011</year>
<volume>129</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>1274-80</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chumbimuni-Torres]]></surname>
<given-names><![CDATA[KY]]></given-names>
</name>
<name>
<surname><![CDATA[Calvo-Marzal]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Electrochemical Sample Matrix Elimination for Trace-Level Potentiometric Detection with Polymeric Membrane Ion-Selective Electrodes]]></article-title>
<source><![CDATA[Anal Chem]]></source>
<year>2008</year>
<volume>80</volume>
<numero>15</numero>
<issue>15</issue>
<page-range>6114-8</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pardi]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Suyani]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Simultaneous Determination of Cu, Pb, Cd, AND, Zn In Tap Water Samples in the Presence of Alizarin Differential Pulse Adsorptive Stripping Voltammetry]]></article-title>
<source><![CDATA[Anal Bioanal Electrochem]]></source>
<year>2017</year>
<volume>9</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>969-81</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gholivand]]></surname>
<given-names><![CDATA[MB]]></given-names>
</name>
<name>
<surname><![CDATA[Ahmadi]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Sohrabi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Adsorptive Stripping Voltammetric Determination of Ultra Trace of Zinc and Lead with Carbidopa as Complexing Agent in Food and Water Samples]]></article-title>
<source><![CDATA[Electroanalysis]]></source>
<year>2007</year>
<volume>19</volume>
<numero>23</numero>
<issue>23</issue>
<page-range>2465-71</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Torma]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Kadar]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Toth]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nafion (R)/2,2 &amp;apos;-bipyridyl-modified bismuth film electrode for anodic stripping voltammetry]]></article-title>
<source><![CDATA[Anal Chim Acta]]></source>
<year>2008</year>
<volume>619</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>173-82</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Deswati]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Pardi]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Suyani]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Development Method for a Sensitive Simultaneous Determination of Pb(II), Cd(II) and Zn(II) by Adsorptive Cathodic Stripping Voltammetry Using Alizarin as a Complexing Agent]]></article-title>
<source><![CDATA[Anal Bioanal Electrochem]]></source>
<year>2016</year>
<volume>8</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>885-98</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Deswati]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Pardi]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Suyani]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Adsorptive Cathodic Stripping Voltammetric Method with Alizarin for the Simultaneous Determination of Cadmium, and Zinc in Water Samples]]></article-title>
<source><![CDATA[Orient J Chem]]></source>
<year>2016</year>
<volume>32</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>3071-80</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Herrero]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Arancibia]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Rojas]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Simultaneous determination of Pb2+, Cd2+ and Zn2+ by adsorptive stripping voltammetry using Clioquinol as a chelating-adsorbent agent]]></article-title>
<source><![CDATA[J Electroanal Chem]]></source>
<year>2014</year>
<volume>729</volume>
<page-range>9-14</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Deswati]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Munaf]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Suyani]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Simultaneous Determination of Trace Amounts of Iron, Cobalt, Nickel and Chromium in WaterSamples with Calcon as Complexing Agent by Adsorptive Stripping Voltammetry]]></article-title>
<source><![CDATA[Asian J Chem]]></source>
<year>2015</year>
<volume>27</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>3978-82</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Deswati]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Pardi]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Suyani]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Adsorptive Stripping Voltammetry for the Simultaneous Determination of Cd, Cu, Cr, and Pb in Water Samples using Fluorexon an Optimization Single Factor]]></article-title>
<source><![CDATA[Anal Bioanal Electrochem]]></source>
<year>2018</year>
<volume>10</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>1491-505</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Deswati]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Suyani]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Izzati]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Adsorptive stripping voltammetric method, vegetable samples, calcein, complexing agente]]></article-title>
<source><![CDATA[RASAYAN J Chem]]></source>
<year>2017</year>
<volume>10</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>549-57</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Deswati]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Suyani]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Izzati]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Optimize, copper, adsorptive stripping voltammetry, central composite design, fruit and vegetable samples]]></article-title>
<source><![CDATA[RASAYAN J Chem]]></source>
<year>2017</year>
<volume>10</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>1359-67</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alghamdi]]></surname>
<given-names><![CDATA[AH]]></given-names>
</name>
</person-group>
<source><![CDATA[Integrat Medic Res]]></source>
<year>2014</year>
<volume>8</volume>
<page-range>19-25</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ensafi]]></surname>
<given-names><![CDATA[AA]]></given-names>
</name>
<name>
<surname><![CDATA[Khaloo]]></surname>
<given-names><![CDATA[SS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Determination of traces molybdenum by catalytic adsorptive stripping voltammetry]]></article-title>
<source><![CDATA[Talanta]]></source>
<year>2005</year>
<volume>65</volume>
<page-range>781-8</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Deswati]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Pardi]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Suyani]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Application of Calcon as Complexing Agent for the Simultaneous Determination of Lead and Cadmium in Sea Water with Adsorptive Cathodic Stripping Voltammetry]]></article-title>
<source><![CDATA[Anal Bioanal Electrochem]]></source>
<year>2018</year>
<volume>10</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>541-53</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Deswati]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Suyani]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Safni]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Simultaneous determination of cadmium, copper and lead in sea water by adsorptive stripping voltammetry in the presence of calcon as a complexing agent]]></article-title>
<source><![CDATA[Indones J Chem]]></source>
<year>2013</year>
<volume>13</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>236-41</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Deswati]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Suyani]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Izzati]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Optimization for the Simultaneous Determination of Zinc in Environmental Samples With Calcon by Adsorptive Stripping Voltammetry Response Surface Methodology]]></article-title>
<source><![CDATA[Orient J Chem]]></source>
<year>2017</year>
<volume>33</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>2060-70</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Work]]></surname>
<given-names><![CDATA[SV]]></given-names>
</name>
</person-group>
<source><![CDATA[AOAC Guidelines for Single Laboratory Validation of Chemical Methods for Dietary Supplements and Botanicals]]></source>
<year>2002</year>
</nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[Stripping Analysis-Principles, Instrumentation and Application,]]></source>
<year>2006</year>
<edition>3</edition>
<publisher-loc><![CDATA[New Jersey ]]></publisher-loc>
<publisher-name><![CDATA[John Wiley &amp; Sons]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[JC]]></given-names>
</name>
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[JN]]></given-names>
</name>
</person-group>
<source><![CDATA[Statistics for analytical chemistry]]></source>
<year>1991</year>
<edition>2</edition>
<publisher-loc><![CDATA[Bandung ]]></publisher-loc>
<publisher-name><![CDATA[Bandung Institute of Technology Publ]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
