Abstract
IF a chemical reaction takes place with change of colour, colorimetric measurements at time intervals form a convenient method for examining the kinetics of the reaction. It is possible to improve the older methods1 based on this principle by the use of the Pulfrich-Stufenphotometer by Zeiss. This instrument permits of measurements: (1) at constant temperature; (2) for a large range of concentrations; (3) with monochromatic light; (4) in coloured and very volatile solvents.
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References
A. Lapworth, Soc., 83, 995; 1903. A. V. Harcourt, Phil. Trans., 212, 187; 1913. G. Edgar and R. A. Wakefield, J. Amer. Chem. Soc., 45, 2242; 1923. A. Batley, Trans. Farad. Soc., 24, 438; 1928. cf. R. Kuhn and A. Wassermann, Annalen, 503, 216; 1933.
cf. V. Henri and H. de Laszlo, Proc. Roy. Soc., A, 105, 670; 1924.
A. Smakula, Z. phys. Chem., B, 25, 94 (Fig. 3); 1934.
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WASSERMANN, A. Kinetic Measurements with the Pulfrich-Stufenphotometer. Nature 134, 101–102 (1934). https://doi.org/10.1038/134101c0
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DOI: https://doi.org/10.1038/134101c0
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