[Ifeffit] sample preparation for liquid samples

["Dr. Dariusz A. Zając"]

  Hi,
you can use the standard sample holder for liquids, or to use something 
similar I constructed/used in Hasylab.
For Mn:K edge you can also think about transmition measurements (if 
sample holder allows). For the concentrations - similar to solids, 
IMVHO. However it is good to measure few concentrations to compare them. 
You should also think about the effect of radiolysis in aqueous 
solution. To eliminate this the sample holder for liquids working in 
continuous-flow mode can be used.
greetings
kicaj
W dniu 11-01-11 10:12, Polzer, Frank pisze:
>
> Dear all,
>
> I would like to measure manganese oxide nanoparticles at the Mn K edge.
>
> The nanoparticles are affixed to polystyrene latex carrier particles 
> (PS) and the whole composite material (MnO2 at PS with ca. 5 m-% MnO2 in 
> the composite) is dispersed in water.
>
> Therefore we consider measuring the composite material in the dried 
> state as a powder as well as in the dispersed state in water. The 
> sample preparation for powders to me is quite straight forward, but I 
> would really appreciate if somebody could share his experience with 
> sample preparation and measurements of liquid samples.
>
> I think that aqueous samples are best measured in the fluorescence 
> mode. That’s why I am concerned of problems like self-absorption and 
> so on.
>
> Can anybody tell my what is a good concentration range to overcome 
> effects like self-absorption and how to get good fluorescence data in 
> general? And what kind of sampler holder or materials (cuvettes, etc.) 
> are best suited for aqueous samples?
>
> I am looking forward to receiving some helpful replies!
>
> Cheers,
>
> Frank
>
> Dipl. Chem. Frank Polzer
>
> F-I2 - Soft Matter and Functional Materials
>
> Helmholtzzentrum Berlin für Materialien und Energie
>
> Lise-Meitner-Campus
>
> Hahn-Meitner-Platz 1
>
> 14109 - Berlin
>
> Tel.: +49 30 8062-43830
>
> Fax:  +49 30 8062-42308
>
> frank.polzer at helmholtz-berlin.de <mailto:frank.polzer at helmholtz-berlin.de>
>
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>
> Forschungszentren e.V
>
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> Treusch,
>
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>
> ------------------------------------------------------------------------
>
> Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
>
> Mitglied der Hermann von Helmholtz-Gemeinschaft Deutscher 
> Forschungszentren e.V
>
> Aufsichtsrat: Vorsitzender Prof. Dr. Dr. h.c. mult. Joachim Treusch, 
> stv. Vorsitzende Dr. Beatrix Vierkorn- Rudolph
> Geschäftsführer: Prof. Dr. Anke Rita Kaysser-Pyzalla, Prof. Dr. Dr. 
> h.c. Wolfgang Eberhardt, Dr. Ulrich Breuer
>
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>
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