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pro vyhledávání: '"Peter Surmann"'
Autor:
Peter Surmann, Hanan Channaa
Publikováno v:
Electroanalysis. 27:1726-1732
The liquid alloy galinstan is used to determine low concentrations in microgram per liter level of trace metals like copper, cadmium, lead, bismuth, antimony and thallium using anodic stripping voltammetry. Like the conventionally applied HMDE, the h
Publikováno v:
Journal of Separation Science. 32:34-43
Astaxanthin shows peak deformation and reduced peak area response when eluted with methanol and methyl tert-butyl ether on nonendcapped polymeric C30-bonded HPLC phases. The present study tested different column manufacturers, column batches, and ten
Autor:
Peter Surmann, Hanan Zeyat
Publikováno v:
Analytical and Bioanalytical Chemistry. 383:1009-1013
Galinstan is a new kind of electrode material and the galinstan electrode is a promising alternative to the commonly used mercury electrodes. The eutectic mixture of gallium, indium and tin is liquid at room temperature (m.p. -19 degrees C) and its v
Publikováno v:
Analytical and Bioanalytical Chemistry. 356:192-196
Electrodes with different surface areas were investigated for the determination of reversible, quasireversible, irreversible or electroinactive substrates. Two kinds of electrodes were constructed, a helical electrode with a given asymmetry and a pla
Autor:
Peter Surmann, Bernhard Peter
Publikováno v:
Electroanalysis. 8:692-697
The influence of the parameters of electrochemical pretreatment of carbon fiber electrodes on the differential pulse voltammetric response of bamipine and imipramine is described. Upon increasing the pretreatment potential a slight activation is foll
Autor:
Peter Surmann, Bernhard Peter
Publikováno v:
Electroanalysis. 8:685-691
The preparation of chemically modified graphite electrodes by various chemical treatments is described. These electrodes were tested with chlorpromazine, cyclopiroxolamine, sulfathiazole, bamipine, sparteine and diphenhydramine by differential pulse
Publikováno v:
Journal of microbiological methods. 88(1)
The structure of secondary metabolites from microorganisms provides a useful tool for microbial characterization and chemotaxonomic classification. Microbial isoprenoid quinones, for example, are well described and used to distinguish among photosynt
Publikováno v:
Journal of microbiological methods. 70(1)
Microbial carotenoids are difficult to extract because of their embedding into a compact matrix and prominent sensitivity to degradation. Especially for carotenoid analysis of bacteria and yeasts, there is lack of information about capability, precis
Publikováno v:
Analytical and bioanalytical chemistry. 356(3-4)
A rigorous method to simulate titration curves with indication using two indicator electrodes (biamperometry) is presented. Computer simulations can be carried out for reversible as well as for irreversible systems. The different parameters like the