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    Article

    Bewertung von Produktölen aus dem Hydrocracking eines Vakuumrückstands durch 1H-NMR-Spektroskopie

    Different oil samples, produced by hydrocracking of vacuum residues, have been characterized by proton NMR spectroscopy. The distribution of various types of carbons and several average structural parameters h...

    Pei-Fang Zhang, Hans-Henning Oelert in Fresenius' Zeitschrift für analytische Chemie (1989)

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    Article

    Ionen-Chromatographie yon Gallium, Indium und Thallium mit Anwendungen in der Erzanalyse

    An optimal separation system is presented for the rarer elements Ga(III), In(III), Tl(III) and the main intergrowth elements such as Fe(III), Cu(II), Pb(II), Zn(II) etc., using the cation-exchange column Nucle...

    Daren Yan, **gan Zhang, Georg Schwedt in Fresenius' Zeitschrift für analytische Chemie (1988)

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    Article

    Ionenaustausch von Chlorid, Bromid und Iodid am Anionenaustauscher Amberlit IRA 458

    The distribution coefficients of Cl−, Br− and I− on the polyacryl anion-exchanger Amberlite IRA 458 are determined as function of pH. It is shown by batch and column experiments that I−-ions can be enriched from ...

    Shao -Cheng Zhang, K. H. Lieser in Fresenius' Zeitschrift für analytische Chemie (1985)

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    Article

    Formazane als funktionelle Gruppen chelatbildender Ionenaustauscher

    An arsonic acid substituted formazan is diazo-coupled to polystyrene. The resulting chelating resin is characterized by distribution coefficients, loading capacities and sorption rates for precious metals and ...

    Zhang Bao Wen, M. Grote, A. Kettrup in Fresenius' Zeitschrift für analytische Chemie (1985)