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T.W. Tan
School of Chemical Science and Food Technology Faculty of Science and Technology Universiti Kebangsaan Malaysia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Mathematics

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Journal : ASEAN Journal on Science and Technology for Development

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Optical ph sensing material prepared from doped sol-gel film for use in acid-base titration Musa Ahmad; T.W. Tan
ASEAN Journal on Science and Technology for Development Vol. 18 No. 2 (2001): ASEAN Journal on Science and Technology for Development (AJSTD)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (434.321 KB) | DOI: 10.29037/ajstd.311

Abstract

An optical pH sensing material has been prepared in this study by using sol-gel technique. Bromothymol blue, bromophenol blue and thymol blue were chosen in this study as acidbase indicators for strong acid-strong base, strong acid-weak base and weak acid-strong base titration, respectively. The results show that these indicators could be successfully entrapped inside the sol-gel film and still maintain its chemical behaviour as in solution. The entrapped acid-base indicators respond well to any pH changes and could be used to determine the end-point of the acid-base titration.
Co-Authors Musa Ahmad