[PDF] Natural Plant Extracts as Acid-Base Indicator and Determination of Their pKa Value | Semantic Scholar (2024)

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@article{Kapilraj2019NaturalPE, title={Natural Plant Extracts as Acid-Base Indicator and Determination of Their pKa Value}, author={N. Kapilraj and S. Keerthanan and M. Sithambaresan}, journal={Journal of Chemistry}, year={2019}, url={https://api.semanticscholar.org/CorpusID:146064813}}
  • N. Kapilraj, S. Keerthanan, M. Sithambaresan
  • Published in Journal of chemistry 10 April 2019
  • Chemistry, Environmental Science

Commonly used indicators for acid-base titrations are synthetic, and this work was focused to identify the eco-friendly natural indicators and to determine their pKa values. The analytical potential of the flower extracts is very promising as seen in its application in acid-base titrimetry. These selected flower extracts were found to perform well in titrating strong acid-strong base than in weak acid-strong base. We have obtained a sharp and clear colour change from red to brownish yellow for…

45 Citations

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Methods Citations

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Results Citations

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45 Citations

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In this research, a new eco-friendly natural color indicator was extracted from Carissa macrocarpa fruit by using a microwave-assisted extraction. The pH of the hydroalcoholic extract was varied from

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The use of natural materials began to be developed on a large scale in chemistry. Natural substances are safe to use, easy to find, and cheaper. Biological indicators in volumetric titration are the

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The work considered comparative analysis of CRI (Curcuma longa rhizome extract indicator) and TLI (Tectona grandis leaves extract indicator) as green indicators versus some synthetic indicators in

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    M. U. LebaAloisius Masan Kopon Anselmus Boy Baunsele

    JURNAL SAINS NATURAL

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Turmeric rhizome is a source of natural yellow pigment which can be applied as a pH indicator. This pigment was extracted from turmeric rhizomes using ethanol as a solvent. The purpose of this study

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Identification of natural dyes with halochromic properties and their potential use as food spoilage indicators
    H. T. RumahMansur B. IbrahimS. M. Gumel

    Agricultural and Food Sciences

    Pigment & Resin Technology

  • 2023

PurposeThe purpose of this research is to identify and investigate some natural dyes with halochromic properties for potential use as food spoilage indicators to reduce waste and curve the negative

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Review on Anthocyanins as herbal pH indicators
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  • 2020

Manganolic extracts of Rosa indica and Rubus occidentalis exhibit sharp and intense color change in comparison to the standard synthetic indicators phenolphthalein and methyl orange in the acid-base titrations.

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Acid dissociation constants (pKa) are important parameters for the characterization of organic and inorganic compounds. They play a crucial role in different physical, chemical, and biological

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Many studies have investigated that natural plant extracts could be used as natural indicators, which are alternatives to commercial pH indicators used in acid-base lessons. However, no study has yet

Carbon Dots as an Indicator of Acid-Base Titration and a Fluorescent Probe for Endoplasm Reticulum Imaging.
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In this study, carbon dots (CDs) with red color are successfully prepared via hydrothermal treatment of o-phenylenediamine and urea. The as-prepared red CDs exhibit an acidichromism feature, making

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Natural Dyes as Acid-Base Indicators from Beta vulgaris
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    Environmental Science, Chemistry

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Methanolic extract of Beta vulgaris was found to be a very useful, economical, simple and accurate for titration and the proposed herbal indicators can be used as a substitute to synthetic indicators.

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    Chemistry, Medicine

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Methanolic fruit extract of Punica granatum from family Puniceaceae gives sharp and intense color changes as compared to Phenolphthalein, Methyl Red and Phenol Red in titrations of acid- base titrations.

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Analytical Applications of Plant Extract as Natural pH Indicator: A Review
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In this review importance of pH indicators in analytical chemistry alongwith the use of plant material or the extracts obtained from plant is described. In the present review some theories related

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A Simplified Method for Finding the pKa of an Acid-Base Indicator by Spectrophotometry
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Experiments on determining the pKa of an acid-base indicator by visible spectroscopy are often found in analytical and physical chemistry lab texts. The procedure described here is a modification

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Spectrophotometric Determination of pKa and Log P of Risperidone
    S. DubeyGautam SinghviAbhay TyagiH. AgarwalK. V. Krishna

    Chemistry, Medicine

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This study reports the experimental value of pKa and log P for Risperidone, an anti-psychotic drug, for the first time.

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Spectrophotometric determination of pKa of nimesulide
    Saranjit SinghN. ShardaL. Mahajan

    Chemistry, Medicine

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Consecutive titrations under non-equilibrium conditions.: A new mode of automatic titration
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    [PDF] Natural Plant Extracts as Acid-Base Indicator and Determination of Their pKa Value | Semantic Scholar (2024)

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