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Application of adsorptive stripping voltammetry to trace measurements of molybdenum in plant materials

Identifieur interne : 000812 ( Istex/Corpus ); précédent : 000811; suivant : 000813

Application of adsorptive stripping voltammetry to trace measurements of molybdenum in plant materials

Auteurs : Mustafa Karakaplan ; Günter Henze

Source :

RBID : ISTEX:2B31C58C7422FCA11883F198E4D148D72AAA74B4

English descriptors

Abstract

A procedure is presented for quantifying molybdenum in dry ashed plant samples. The determination is made by adsorptive stripping voltammetry in the differential pulse mode (DPAdSV). It is based on the adsorptive accumulation of the Mo(VI)‐chloranilic acid complex on the surface of a hanging mercury drop, followed by the reduction of the adsorbed complex. Optimal conditions are stirred acidified supporting electrolyte solution (of pH 2–3), containing 10−3 mol/L chloranilic acid and an accumulation potential of −0.20 V (vs. Ag/AgCl, 3 mol/L KCl). The height of the cathodic stripping peak around −0.60 V depends linearly on the molybdenum concentration and accumulation time (over the ranges 0–12 ng/ml and 0–300 seconds, respectively). For an accumulation period of 5 minutes, the detection limit is 0.02 ng/ml. Possible interferences by other trace metals are investigated. The proposed procedure has been applied to the determination of molybdenum traces in a variety of plants with good accuracy and precision. The results are in good agreement with those obtained by atomic absorption spectrometry.

Url:
DOI: 10.1002/elan.1140050717

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ISTEX:2B31C58C7422FCA11883F198E4D148D72AAA74B4

Le document en format XML

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<p>A procedure is presented for quantifying molybdenum in dry ashed plant samples. The determination is made by adsorptive stripping voltammetry in the differential pulse mode (DPAdSV). It is based on the adsorptive accumulation of the Mo(VI)‐chloranilic acid complex on the surface of a hanging mercury drop, followed by the reduction of the adsorbed complex. Optimal conditions are stirred acidified supporting electrolyte solution (of pH 2–3), containing 10
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<namePart type="given">GÜNter</namePart>
<namePart type="family">Henze</namePart>
<affiliation>Inönü Üniversitesi, Fen‐Edebiyat Fakültesi, Kimya Bölümü, TR‐44069 Malatya, Turkey</affiliation>
<affiliation>Inönü Üniversitesi, Fen‐Edebiyat Fakültesi, Kimya Bölümü, TR‐44069 Malatya, Turkey</affiliation>
<role>
<roleTerm type="text">author</roleTerm>
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<typeOfResource>text</typeOfResource>
<genre type="brief-communication" displayLabel="shortCommunication"></genre>
<originInfo>
<publisher>VCH Verlagsgesellschaft mbH</publisher>
<place>
<placeTerm type="text">Weinheim</placeTerm>
</place>
<dateIssued encoding="w3cdtf">1993-08</dateIssued>
<dateCaptured encoding="w3cdtf">1992-03-18</dateCaptured>
<copyrightDate encoding="w3cdtf">1993</copyrightDate>
</originInfo>
<language>
<languageTerm type="code" authority="rfc3066">en</languageTerm>
<languageTerm type="code" authority="iso639-2b">eng</languageTerm>
</language>
<physicalDescription>
<internetMediaType>text/html</internetMediaType>
<extent unit="figures">3</extent>
<extent unit="tables">1</extent>
<extent unit="references">5</extent>
</physicalDescription>
<abstract lang="en">A procedure is presented for quantifying molybdenum in dry ashed plant samples. The determination is made by adsorptive stripping voltammetry in the differential pulse mode (DPAdSV). It is based on the adsorptive accumulation of the Mo(VI)‐chloranilic acid complex on the surface of a hanging mercury drop, followed by the reduction of the adsorbed complex. Optimal conditions are stirred acidified supporting electrolyte solution (of pH 2–3), containing 10−3 mol/L chloranilic acid and an accumulation potential of −0.20 V (vs. Ag/AgCl, 3 mol/L KCl). The height of the cathodic stripping peak around −0.60 V depends linearly on the molybdenum concentration and accumulation time (over the ranges 0–12 ng/ml and 0–300 seconds, respectively). For an accumulation period of 5 minutes, the detection limit is 0.02 ng/ml. Possible interferences by other trace metals are investigated. The proposed procedure has been applied to the determination of molybdenum traces in a variety of plants with good accuracy and precision. The results are in good agreement with those obtained by atomic absorption spectrometry.</abstract>
<subject lang="en">
<genre>keywords</genre>
<topic>Molybdenum</topic>
<topic>Plant materials</topic>
<topic>Adsorptive stripping voltammetry</topic>
</subject>
<relatedItem type="host">
<titleInfo>
<title>Electroanalysis</title>
</titleInfo>
<titleInfo type="abbreviated">
<title>Electroanalysis</title>
</titleInfo>
<genre type="journal">journal</genre>
<subject>
<genre>article-category</genre>
<topic>Short Communication</topic>
</subject>
<identifier type="ISSN">1040-0397</identifier>
<identifier type="eISSN">1521-4109</identifier>
<identifier type="DOI">10.1002/(ISSN)1521-4109</identifier>
<identifier type="PublisherID">ELAN</identifier>
<part>
<date>1993</date>
<detail type="volume">
<caption>vol.</caption>
<number>5</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>7</number>
</detail>
<extent unit="pages">
<start>623</start>
<end>625</end>
<total>3</total>
</extent>
</part>
</relatedItem>
<identifier type="istex">2B31C58C7422FCA11883F198E4D148D72AAA74B4</identifier>
<identifier type="DOI">10.1002/elan.1140050717</identifier>
<identifier type="ArticleID">ELAN1140050717</identifier>
<accessCondition type="use and reproduction" contentType="copyright">Copyright © 1993 VCH Publishers, Inc.</accessCondition>
<recordInfo>
<recordContentSource>WILEY</recordContentSource>
<recordOrigin>VCH Verlagsgesellschaft mbH</recordOrigin>
</recordInfo>
</mods>
</metadata>
<serie></serie>
</istex>
</record>

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