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4 Biphenylamine

The Experts below are selected from a list of 12 Experts worldwide ranked by ideXlab platform

Boguslaw Buszewski – 1st expert on this subject based on the ideXlab platform

  • isolation and determination of 4 Biphenylamine for air sample by spe hplc coupling
    Journal of Liquid Chromatography & Related Technologies, 2011
    Co-Authors: Anna Jezewska, Boguslaw Buszewski

    Abstract:

    The method of determination of 4Biphenylamine (4-BA) in workplace air using SPE and HPLC has been presented. The method consists in passing the air that contains 4-BA through a glass fiber filter with sulfuric acid placed on it, washing out the substance settled on the filter, using water and a solution of sodium hydroxide, solid phase extraction (SPE) in order to enrich the analyte, replace the dissolvent with methanol, and analyze the obtained solution using a method of highly efficient liquid chromatography with fluorescent detection (λex = 268 nm, λem = 389 nm). Measuring range for the 100 dm3 air sample was: 0.1–2 μg/m3. Limit of detection (LOD) and limit of quantification (LOQ) were 0.18 ng/m3 and 0.54 ng/m3, respectively.

Anna Jezewska – 2nd expert on this subject based on the ideXlab platform

  • isolation and determination of 4 Biphenylamine for air sample by spe hplc coupling
    Journal of Liquid Chromatography & Related Technologies, 2011
    Co-Authors: Anna Jezewska, Boguslaw Buszewski

    Abstract:

    The method of determination of 4Biphenylamine (4-BA) in workplace air using SPE and HPLC has been presented. The method consists in passing the air that contains 4-BA through a glass fiber filter with sulfuric acid placed on it, washing out the substance settled on the filter, using water and a solution of sodium hydroxide, solid phase extraction (SPE) in order to enrich the analyte, replace the dissolvent with methanol, and analyze the obtained solution using a method of highly efficient liquid chromatography with fluorescent detection (λex = 268 nm, λem = 389 nm). Measuring range for the 100 dm3 air sample was: 0.1–2 μg/m3. Limit of detection (LOD) and limit of quantification (LOQ) were 0.18 ng/m3 and 0.54 ng/m3, respectively.

Masaomi Sasaki – 3rd expert on this subject based on the ideXlab platform

  • Energy gap dependence of the photocarrier generation efficiency in layered organic photoreceptors
    The Journal of Physical Chemistry, 1993
    Co-Authors: Minoru Umeda, Tomoyuki Shimada, Tamotsu Aruga, Tatsuya Niimi, Masaomi Sasaki

    Abstract:

    The photocarrier generation mechanism was studied in layered-type organic photoreceptors containing triphenylamine-based trisazo pigment in the carrier generation layer (CGL). The photocarrier generation efficiency strongly depended upon a series of N,N-diphenyl-4Biphenylamine derivatives utilized in the carrier transport layer (CTL). The dependence was successfully elucidated by means of the energy gap law using the energy gap of the electrochemical oxidation-potential difference between the azo pigment and the N,N-diphenyl-4Biphenylamine derivatives. This confirms that photocarrier generation occurs at the CGL/CTL interface and is based on photoinduced electron transfer. The reorganization energy originated in the solid system and the extent of adiabaticity of the reaction are discussed. 34 refs., 3 figs., 1 tab.