Studies on the Analysis of a Surface Active Agents. XV.:Analysis of the Cationics·Ampholytics·Nonionics Ternary System. 1. Separation and Determination of Nonionics in the Mixtures

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For the analysis of nonionics in cationics-ampholytics-nonionics ternary mixtures, the quantitative separation of nonionics from the mixtures by ion-exchange technique and the determination of isolated nonionics by Schönfeldt method and UV absorption spectrophotometry have been investigated, and the "Cation Exchange-Schönfeldt" method and "Semimicro Cation Exchange-UV Spectrophotometry" method have been developed. The methods consist of two steps : (1st) ion-exchange separation of nonionics from mixtures by means of a column method and (2nd) determination of isolated nonionics by Schönfeldt method or UV absorption spectrophotometry. The results showed that nonionics was separated quantitatively from the mixtures in 10% isopropanol aqueous solution, by using Amberlite IR 120 (H+) and adjusting to pH 2.02.5, and that the isolated nonionics was determined with satisfactory accuracy by Schönfeldt method and by measuring extinction of the effluent at 277mμ (λmax of nonionics : POE Nonylphenol).
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