Improved synthesis of polymethoxytriphenyl-methanols for use as one-colour pH indicators.
Jack L. Lambert, Todd C. Bird, Michael D. Rogers and Joseph V. Paukstelis
Analyst, 1981, 106, 1013 - 1016, DOI: 10.1039/AN9810601013
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http://dx.doi.org/10.1039/AN9810601013