2000
Preconcentration and separation of gold on modified silica gel
HÁJKOVÁ, Jana, Viktor KANICKÝ a Vítězslav OTRUBAZákladní údaje
Originální název
Preconcentration and separation of gold on modified silica gel
Autoři
HÁJKOVÁ, Jana (203 Česká republika), Viktor KANICKÝ (203 Česká republika, garant) a Vítězslav OTRUBA (203 Česká republika)
Vydání
Collection of Czechoslovak Chemical Communications, Prague, IOCB, 2000, 0010-0765
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10406 Analytical chemistry
Stát vydavatele
Česká republika
Utajení
není předmětem státního či obchodního tajemství
Impakt faktor
Impact factor: 0.960
Kód RIV
RIV/00216224:14310/00:00002851
Organizační jednotka
Přírodovědecká fakulta
UT WoS
000167546600003
Klíčová slova anglicky
Solid phase extraction; Gold; Ionic associates; Atomic emission spectrometry; Inductively coupled plasma
Štítky
Příznaky
Recenzováno
Změněno: 29. 6. 2007 10:20, prof. RNDr. Viktor Kanický, DrSc.
V originále
Gold was preconcentrated in the form of ion associates of its chloro- or cyanocomplexes with quarternary onium salts on C18 modified silicagel and eluted analyte was determined using inductively coupled plasma atomic emission spectrometry
Česky
Selective preconcentration of gold in the form of ion associates of Au(III) chloro complex or Au(I) cyano complex with quaternary bases was studied using modified silica gel. Solutions containing gold in the presence of the complexing anion and a quaternary base were pumped through a Separon(TM) SGX C18 column. After elution with 96 vol.% ethanol, the eluate was evaporated in the presence a complexing agent (chloride or cyanide). The resulting aqueous solutions were analyzed with inductively coupled plasma atomic emission spectrometry. The influence of concentration of onium salts, chlorides, nitrates, and the influence of the sample volume on the sorption were studied. The sorption flow rate and the elution volume were optimized, and the separation from a geological sample matrix was verified. The best recovery (100%) of preconcentration of Au(III) chloro complex was obtained with [1-(ethoxycarbonyl)pentadecyl] trimethylammonium bromide and 1-hexadecylpyridinium chloride at concentrations of 0.006 and 0.004 mol dm(-3), respectively. The sorption flow rate of a sample may vary in the range 0.4-7 cm(3) min(-1) the elution volume was between 5 and 6 cm(3) The recovery decreased with increasing sample volume above 250 cm(3) and was diminished by 10% in the presence of nitrates above 0.4 mol dm(-3). Major accompanying elements Fe and Mn, which considerably interfere at the Au I 242.795 nm line, were quantitatively separated from gold. A Czech certified reference material 1001 Mokrsko was analyzed using the developed preconcentration technique and inductively coupled plasma atomic emission spectrometry, inductively coupled plasma mass spectrometry, and atomic absorption spectrometry. Sorption of ion associates of Au(I) cyano complex was also efficient.
Návaznosti
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