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Es wird ein neuartiges interferenzoptisches Verfahren zur Messung der elektrophoretischen Beweglichkeit dispergierter Teilchen vorgestellt. Das Verfahren eignet sich insbesondere fürs Messungen an hochkonzentrierten nicht-wäßrigen Dispersionen org. und anorg. Farbpigmente mit submikroskopisch kleinen Teilchen. Die Methode basiert auf dem Prinzip der Phasendifferenzmodulation zweier interferierender...