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Statements

Subject Item
n2:RIV%2F61388980%3A_____%2F02%3A50023035%21RIV%2F2003%2FGA0%2FA50003%2FN
rdf:type
n16:Vysledek skos:Concept
dcterms:description
Ferric oxide admixtures in the concentration range 0.1-10% in soils, sediments, and clay mineral samples can be conveniently characterized by Vis diffuse reflectance spectroscopy (DRS) in the region of d-d electron transitions close to 500 tint, voltammetry of microparticles, and voltatmmetry with carbon paste electroactive electrode (CPEE). DRS also detects Fe(Ill) in the clay mineral matrix equally sensitively. Voltammetry of microparticles is suitable for direct detection of free crystalline and amorphous ferric oxides, The determination limit of total free ferric oxides with CPEE is -0.01%. The techniques were tested with six clay mineral samples. XRD was able to detect free FeOOH in only one of them (1.6%). DRS and CPEE also detected 0.19% FeOOH in Be-3 (bentonite of Rokle deposit, Bohemia) and,C 0.04% in reference montmorillonite SWy-2. Ferric oxide admixtures in the concentration range 0.1-10% in soils, sediments, and clay mineral samples can be conveniently characterized by Vis diffuse reflectance spectroscopy (DRS) in the region of d-d electron transitions close to 500 tint, voltammetry of microparticles, and voltatmmetry with carbon paste electroactive electrode (CPEE). DRS also detects Fe(Ill) in the clay mineral matrix equally sensitively. Voltammetry of microparticles is suitable for direct detection of free crystalline and amorphous ferric oxides, The determination limit of total free ferric oxides with CPEE is -0.01%. The techniques were tested with six clay mineral samples. XRD was able to detect free FeOOH in only one of them (1.6%). DRS and CPEE also detected 0.19% FeOOH in Be-3 (bentonite of Rokle deposit, Bohemia) and,C 0.04% in reference montmorillonite SWy-2.
dcterms:title
Analysis of low concentration of free ferric oxides in clays by vis diffuse reflectance spectroscopy and voltammetry. Analysis of low concentration of free ferric oxides in clays by vis diffuse reflectance spectroscopy and voltammetry.
skos:prefLabel
Analysis of low concentration of free ferric oxides in clays by vis diffuse reflectance spectroscopy and voltammetry. Analysis of low concentration of free ferric oxides in clays by vis diffuse reflectance spectroscopy and voltammetry.
skos:notation
RIV/61388980:_____/02:50023035!RIV/2003/GA0/A50003/N
n4:strany
71;77
n4:aktivita
n12:Z n12:P
n4:aktivity
P(GA205/00/1349), Z(AV0Z4032918), Z(AV0Z4040901)
n4:cisloPeriodika
2
n4:dodaniDat
n5:2003
n4:domaciTvurceVysledku
n9:5758491 n9:4208994
n4:druhVysledku
n14:J
n4:duvernostUdaju
n8:S
n4:entitaPredkladatele
n18:predkladatel
n4:idSjednocenehoVysledku
638082
n4:idVysledku
RIV/61388980:_____/02:50023035
n4:jazykVysledku
n15:eng
n4:klicovaSlova
voltammetry; Vis spectroscopy; analysis
n4:klicoveSlovo
n10:analysis n10:voltammetry n10:Vis%20spectroscopy
n4:kodStatuVydavatele
SK - Slovenská republika
n4:kontrolniKodProRIV
[BB8B5E285327]
n4:nazevZdroje
Geologica Carpathica
n4:obor
n7:CA
n4:pocetDomacichTvurcuVysledku
2
n4:pocetTvurcuVysledku
3
n4:pocetUcastnikuAkce
0
n4:pocetZahranicnichUcastnikuAkce
0
n4:projekt
n13:GA205%2F00%2F1349
n4:rokUplatneniVysledku
n5:2002
n4:svazekPeriodika
53
n4:tvurceVysledku
Grygar, Tomáš Hradil, David Dědeček, Jiří
n4:zamer
n6:AV0Z4032918 n6:AV0Z4040901
s:issn
0016-7738
s:numberOfPages
7