A Simple Colorimetric Procedure for Differentiating Anions Using Flower Pigments from Anthurium andreanum

A Simple Colorimetric Procedure for Differentiating Anions Using Flower Pigments from Anthurium andreanum

A simple, “green” and colorimetric approach in differentiating various anions is presented. Acidified ethanolic extracts from flowers of Anthurium andreanum undergo color changes in the presence of HSO4-, CH3COO-, C6H5COO-, HCO3-, CO32-, HPO42- and PO43- anions in aqueous solutions. Anionic acid-bas...

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Veröffentlicht in:Oriental journal of chemistry 2016-06, Vol.32 (3), p.1347-1352
Hauptverfasser: Galingana, Maynard O., Organo, Voltaire G.
Format: Artikel
Sprache:eng
Schlagworte:
Acidification
Acids
Anions
Aqueous solutions
Color
Colorimetry
Flowers
Food
Phosphates
Pigments
Studies
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Beschreibung
Zusammenfassung:A simple, “green” and colorimetric approach in differentiating various anions is presented. Acidified ethanolic extracts from flowers of Anthurium andreanum undergo color changes in the presence of HSO4-, CH3COO-, C6H5COO-, HCO3-, CO32-, HPO42- and PO43- anions in aqueous solutions. Anionic acid-base conjugate pairs such as HCO3- and CO32-, HSO4- and SO42-, and phosphates H2PO4-, HPO42-, and PO43- can also be discriminated from each other. Visible spectroscopic analysis indicates possible structural changes in pigments due to pH change of solution as a consequence of the basic property of anions.
ISSN:0970-020X
2231-5039
DOI:10.13005/ojc/320308