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- W2110710114 abstract "Environmental protection must require the use of natural products instead of chemicals to minimize pollution. Thus, this investigation studies the use of some plant flowers as naturally occurring acid-base indicators. We utilized plant flowers of Celosiacristate Linn, Bombax ceiba L., Poincianaregia and Hibiscus subdariffa. These flowers contain anthocyanine pigments whose colour depends on pH; there fore they are used as pH indicators. The acid-base equilibria of these pigments were investigated using spectro photometric and potentiometric methods. The pk values are 9.6 for Celosiacristate Linn, 5.7 for Bombax ceiba L., 8.6 for Poincianaregia and 2.8 & 7.3 for Hibiscus subdariffa. Experimentation of these indicators on different concentrations of acid-base titrations in the presence of variable concentrations exhibited similar results as for synthetic indicators." @default.
- W2110710114 created "2016-06-24" @default.
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- W2110710114 date "2002-02-01" @default.
- W2110710114 modified "2023-10-16" @default.
- W2110710114 title "Usefulness of Some Plant Flowers as Natural Acid-Base Indicators" @default.
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- W2110710114 doi "https://doi.org/10.1002/jccs.200200011" @default.
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