Overcome by conditioning to desensitize the sensing eleis capab1e merit. Once desensitized, the of measuring calcium ion activity with no interferent effect LAS. The latter, however, was from the anionic surfactant observed to interact with calcium according to the usual interionic interaction principles. The interference effect of Hyamine be overcome. Such effect$however, can be utilized in conjunction with the formation of a Hyamine selective electrode. ~h~ latter can then be used as an indicator electrode in the Dotentiometric titration of anionic surfactants. I t is also possible to develop automated analyzers for the determination of cationic and anionic surfactants based on ion-electrode sensing and continuous flow techniques (39, 40). Such investigations are currently under way in our laboratories.
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