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      Encapsulation of methyl orange pH-indicator into a sol-gel matrix

      Zaggout, Farid R.; El-Ashgar, Nizam M.; Zourab, Shehata M.; El-Nahhal, Issa M.; Motaweh, Hanan (North-Holland, 2005)
      The acid catalyzed sol-gel reaction was used to encapsulate methyl orange pH-indicator into transparent monolithic silica matrices. Tetraethylorthosilicate was used for the entrapment of the methyl orange indicator. The ...
    • Encapsulation of Methyl Red pH‐Indicator into a Sol‐Gel Matrix

      Zaggout, Farid R.; El-Nahhal, Issa M.; Zourab, Shehata M.; El-Ashgar, Nizam M.; El‐dawahedy, Naji; Motaweh, Hanan (Taylor & Francis Group, 2005)
      Encapsulation of methyl red pH indicator into transparent monolithic silica matrices was made via the acid‐catalyzed sol‐gel reaction of tetraethylorthosilicate and methyl red indicator. The immobilized methyl red shows ...