TY - JOUR
AU - Prema, K. H.
AB - Naturally derived pH indicators are always been the prime focus in analytical chemistry. Anthocyanins are among them, and their use in acid–base indicator chemistry is generating a lot of interest. The key objective of this study was to assess the feasibility of aqueous electrolyte-based extraction of plant pigment from Syzygium samarangenese and Flacourtia jangomas fruits. These extracts were then validated for their potential as acid–base indicator. Optimisation studies of extraction based on various solvent concentrations and electrolyte concentrations were taken into consideration. Among various electrolytes used, 20% aqueous sodium chloride yielded the better extraction. The extracts contain anthocyanin pigment (cyanidin-3-glucoside), which was characterized by UV–Vis spectral analysis. The pH-based indicator behaviour of the extract was analysed for various acid–base titrations, and the results were compared with those of conventional indicators like phenolphthalein and methyl orange. These natural indicators are found to exhibit an obvious colour change with pH. pH paper strips from these extracts were developed. The analysed statistical data ensured the reliability of the performance of these natural indicators. This particular study suggests a greener extraction route for the anthocyanin pigment from natural sources like Syzygium samarangenese and Flacourtia jangomas fruits, which can perform well as pH-based indicators. Contrary to conventional extraction methods using toxic organic solvents, aqueous electrolyte-based extraction was found to be a simpler and more efficient method.Graphical Abstract[graphic not available: see fulltext]
TI - Greener Extraction of Anthocyanin Pigment from Syzygium samarangenese and Flacourtia jangomas: An Alternative to Synthetic pH Indicators
JF - Waste and Biomass Valorization
DO - 10.1007/s12649-023-02245-x
DA - 2024-02-01
UR - https://www.deepdyve.com/lp/springer-journals/greener-extraction-of-anthocyanin-pigment-from-syzygium-samarangenese-3xo0vYmMa7
SP - 1175
EP - 1184
VL - 15
IS - 2
DP - DeepDyve
ER -