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| Anionic surfactant in SD (20 ppm) |
| Log #172A Titration Application Note |
| The concentration of SD in aqueous solutions can be determined by titrating with Hyamine 1622 using the first derivative endpoint technique and a surfactant electrode. Hyamine 1622 is a large cationic surfactant that reacts with dodecylbenzenesulfonate and other anionic surfactants to form a fine precipitate. The surfactant electrode is ideally suited for this method because it is highly sensitive to anionic surfactants. |
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