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Statements

Subject Item
n2:RIV%2F00216275%3A25310%2F98%3A00003868%21RIV06-MSM-25310___
rdf:type
skos:Concept n11:Vysledek
dcterms:description
Stanovení jodidů s využitím kombinovaného mechanismu akumulace na uhlíkové pastové elektrodě metodou stripping voltametrie Carbon paste electrodes (CPEs) of various compositions were studied to elucidate the stripping voltammetric behavior of iodide. At an accumulation potential of +0.7 V (vs. Ag/AgCl), the CPE containing tricresyl phosphate as a pasting liquid was able to preconcetrate iodide effectively via ion-pairing reaction followed by oxidation to iodine and its extraction onto pasting liquid. In a supporting electrolyte containing 0.5 M NaCl and 0.1 M HCl, the reduction signal was proportional to iodide concentration from 5 x 10(-6) to 5 x 10(-7) mol/L with a detection limit of approximately 2.5 x 10(-7) mol/L (accumulation for 5 min). Other halides and pseudohalides did not interfere with the determination, except for a high concentration excess of thiocyanate and bromide (100:1). The method was tested on model solutions and was applied to determine total iodine in samples of table salts and mineral water. The results were compared to those obtained by reference methods. Carbon paste electrodes (CPEs) of various compositions were studied to elucidate the stripping voltammetric behavior of iodide. At an accumulation potential of +0.7 V (vs. Ag/AgCl), the CPE containing tricresyl phosphate as a pasting liquid was able to preconcetrate iodide effectively via ion-pairing reaction followed by oxidation to iodine and its extraction onto pasting liquid. In a supporting electrolyte containing 0.5 M NaCl and 0.1 M HCl, the reduction signal was proportional to iodide concentration from 5 x 10(-6) to 5 x 10(-7) mol/L with a detection limit of approximately 2.5 x 10(-7) mol/L (accumulation for 5 min). Other halides and pseudohalides did not interfere with the determination, except for a high concentration excess of thiocyanate and bromide (100:1). The method was tested on model solutions and was applied to determine total iodine in samples of table salts and mineral water. The results were compared to those obtained by reference methods.
dcterms:title
Stripping voltammetric determination of iodide with synergistic accumulation at a carbon paste electrode Stripping voltammetric determination of iodide with synergistic accumulation at a carbon paste electrode Stanovení jodidů s využitím kombinovaného mechanismu akumulace na uhlíkové pastové elektrodě metodou stripping voltametrie
skos:prefLabel
Stanovení jodidů s využitím kombinovaného mechanismu akumulace na uhlíkové pastové elektrodě metodou stripping voltametrie Stripping voltammetric determination of iodide with synergistic accumulation at a carbon paste electrode Stripping voltammetric determination of iodide with synergistic accumulation at a carbon paste electrode
skos:notation
RIV/00216275:25310/98:00003868!RIV06-MSM-25310___
n4:strany
435-441
n4:aktivita
n9:P
n4:aktivity
P(OE37/1)
n4:cisloPeriodika
6
n4:dodaniDat
n5:2006
n4:domaciTvurceVysledku
n8:9805524 n8:6143083
n4:druhVysledku
n10:J
n4:duvernostUdaju
n14:S
n4:entitaPredkladatele
n13:predkladatel
n4:idSjednocenehoVysledku
785339
n4:idVysledku
RIV/00216275:25310/98:00003868
n4:jazykVysledku
n17:eng
n4:klicovaSlova
stripping voltametric determination of iodide; carbon paste electrode
n4:klicoveSlovo
n7:carbon%20paste%20electrode n7:stripping%20voltametric%20determination%20of%20iodide
n4:kodStatuVydavatele
DE - Spolková republika Německo
n4:kontrolniKodProRIV
[D8966C24EB3C]
n4:nazevZdroje
Electroanalysis
n4:obor
n16:DJ
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
5
n4:projekt
n18:OE37%2F1
n4:rokUplatneniVysledku
n5:1998
n4:svazekPeriodika
10
n4:tvurceVysledku
Konvalina, Jiří Švancara, Ivan Schachl, K. Kalcher, K. Vytřas, Karel
s:issn
1040-0397
s:numberOfPages
7
n12:organizacniJednotka
25310