Determination of surfaceactive agents,7

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  • Determination of Surfaceactive Agents. VII. Differential Determination of Cationics and Nonionics in Mixture.

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A volumetric determination of cationics and nonionics in mixtures was established with sodium tetraphenylborate as a titrant using Methyl Orange and Congo Red as indicators. For the determination of cationics, this method could be applied to a mixture of one mole of cationics and two moles of nonionics with an error of ±1%. For the determination of nonionics, this method could be applied to a mixture of one mole of nonionics and forty moles of cationics with an error of ±5%.

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