Stability Study of Betacyanin Extract from Red Dragon Fruit (Hylocereus Polyrhizus) Peels

Abstract

The purpose of this study was to determine the effect of alginate and CaCl2 concentration of antioxidant activity and betacyanin content of restructuring product of red dragon fruit, and to determine the best formulation of the product restructuring that produces antioxidant activity and the content of the highest betacyanin on product restructuring. Data were analyzed by 4x2 Factorial Design and Randomized Completely Block Design (RCBD) with 4 replications. As the first factor is the alginate concentration which are 2 %, 3 %, 4 % and 5 %. The second factors are calcium cloride (CaCl2) 0.5 % and 0.75 %, while as the block is the time analysis. To test the differences between treatments means, the Honestly Significant of Differences (HSD) were used at 5% level of significant.The results showed that the higher concentrations of alginate and CaCl2 causes declining content of antioxidant activity and betacyanin, the best results are obtained is at a concentration of 2% alginate and CaCl2 0.5% with betacyanin levels 0.537 ± 0.062 mg/g dry weight basis and 0.132 ± 0.011 mg / g wet weight basis. The antioxidant activity of H. polyrhyzus restructuring amounted to 77.452% ± 0.624. ©2016 JNSMR UIN Walisongo. All rights reserved.

Betacyanins in dragon fruit peels: the kinetic models of their degradation under different treatment conditions

“…The content of betacyanins was 9.22 mg g −1 dry sample, which was higher than 185.5 mg/100 g (Stintzing et al ., ) and 515.20 μg/100 g extracted by methanol (Priatni & Pradita, ). From the HPLC of Fig.…”

“…The degradation kinetic models of APS, LPS and PCPS were . A recent paper showed that the equation of linear squares data of betacyanins in dragon fruit peels was y = −7231 x + 1668 (Priatni & Pradita, ), which was different from our equation: y APS = −4555.1 x + 11.405. Some studies reported increasing betalain degradation rates resulting from increasing temperature, that is the longer the exposure time was, the more serious degradation was (Mello et al ., ; Xu et al ., ; Song et al ., ).…”

“…The current research is to study the degradation time of the extracted pigment. Priatni & Pradita () studied the kinetics of betacyanins thermal degradation and the Arrhenius data showed that betacyanins extracted from water solution follow the first‐order kinetics model with its half life time ( t 1/2 ) at 25 °C was 23 h. However, whether the addition of a substance that enhances its stability in betacyanins solution can successfully prolong its half‐life requires further study.…”

“…The current research is to study the degradation time of the extracted pigment. Priatni & Pradita (2015) studied the kinetics of betacyanins thermal degradation and the Arrhenius data showed that betacyanins extracted from water solution follow the first-order kinetics model with its half life time (t 1/2 ) at 25°C was 23 h. However, whether the addition of a substance that enhances its stability in betacyanins solution can successfully prolong its halflife requires further study. Therefore, the purpose of this study was to select the optimal stabiliser from concentrations of sugars (including monosaccharide and disaccharide) and metal cation for betacyanin to increase its stability and prolong its degradation half-life.…”

Valorization of byproducts from tropical fruits: Extraction methodologies, applications, environmental, and economic assessment: A review (Part 1: General overview of the byproducts, traditional biorefinery practices, and possible applications)

“…Studies have shown that dragon fruit byproducts have a high concentration of different bioactive compounds. Priatni and Pradita () found that acidified methanol allowed a higher extraction of betacyanins from peels (515 µg per 100 g FW), compared with the extraction yield of acidified water (491 µg per 100 g FW). Moreover, the stability of the extracted betacyanin was higher in the organic extract after five hours storage at room temperature.…”