Research Article
Sol-Gel Thin Films Immobilized with Bromocresol Purple pH-Sensitive Indicator in Presence of Surfactants
Figure 23
Absorption spectra of immobilized BCP/SDS at pH 7 after immersed in 1 M aqueous solutions of: (a) sodium hydroxide; (b) ammonium hydroxide; (c) hydrochloric acid; (d) acetic Acid; (e) potassium hydroxide; (f) distilled water.
