caa a22 4500 378930966 CHVBK 20180305123629.0 cr unu---uuuuu 161128e20040801xx s 000 0 eng 10.1524/ract.92.8.513.39275 doi (NATIONALLICENCE)gruyter-10.1524/ract.92.8.513.39275 Investigations on adsorption and transport behaviour of carrier-free silver, gold and platinum in quartz columns under vacuum conditions [Elektronische Daten] [Alexander Hohn, R. Eichler, B. Eichler] The adsorption enthalpy of silver and gold atoms on fused silica surfaces was measured using vacuum-thermochromatography. Carrier-free silver, gold and platinum nuclides were produced by irradiation of cadmium, lead and mercury targets at the Swiss Spallation Neutron Source SINQ, followed by a thermochromatographic separation. For the calculation of the adsorption enthalpy from experimental data a thermodynamic model and a kinetic model (Monte Carlo simulation) were used. Our measurements revealed an adsorption enthalpy of -279±10kJ/mol for gold, -232±13kJ/mol for silver and an upper limit of -430kJ/mol for platinum. These values, determined by the thermodynamic model, are in good agreement with literature values based on the same model. Additionally, Monte Carlo simulations have been performed to demonstrate the influence of temperature and size of quartz columns on the transport of model-isotopes with different half-lives. © 2004 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Hohn Alexander aut Eichler R. aut Eichler B. aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 92/8/2004(2004-08-01), 513-516 0033-8230 92:8/2004<513 2004 92 ract https://doi.org/10.1524/ract.92.8.513.39275 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.92.8.513.39275 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hohn Alexander aut NATIONALLICENCE 700 1- Eichler R. aut NATIONALLICENCE 700 1- Eichler B. aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 92/8/2004(2004-08-01), 513-516 0033-8230 92:8/2004<513 2004 92 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter