Near infrared spectroscopy and smartphone-based imaging as fast alternatives for the evaluation of the bioactive potential of freeze-dried açai

Caramês, Elem Tamirys dos Santos; Baqueta, Michel Rocha; Conceição, Deborah A.

doi:10.1016/j.foodres.2020.109792

Cited by 10 publications

(4 citation statements)

References 34 publications

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“…The use of such equipment is recognized as an innovative technology with numerous applications. Recently, many studies have shown the usage of smartphones as a promising and innovative tool in the food industry, among which stands out the determination of ascorbic acid in natural juice (Porto et al, 2019); the bioactive compounds' potential in freeze dried açaí (Caramês et al, 2021); determination of bioactive compounds in grape juice (Porto et al, 2019); and to quantify furfural in lager beer samples (Rico-Yuste et al, 2016). Considering the great potential of smartphone's usage in colorimetric tests and the lack of studies on determining the amount of phenolic compounds of different food samples without the use of expensive equipment, the present study seeks to propose a rapid, easily applied, eco-friendly and low-cost methodology to determine phenolic compounds through digital images, using smartphones and the Colorgrab ® application.…”

Section: Introductionmentioning

confidence: 99%

Determination of total phenolic compounds in plant extracts via Folin-Ciocalteu’s method adapted to the usage of digital images

et al. 2022

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The food industry shows great interest on researching innovative and alternative methods to determine phenolics compounds' . Hence, the present study aims to develop a technique based on Folin-Ciocalteu's method to determine the total amount of phenolic compounds of a sample using a smartphone as a tool for obtaining digital images of the analysis' and evaluating them through the Colorgrab ® application. In this study, color parameters S, L, V and I were evaluated, as well as experimental parameters such as distance between sample and camera, light temperature, and sample's volume. To improve analytical conditions, phenolic compounds were determined through the conventional Folin-Ciocalteu's method, with the results being compared to the data obtained from the adapted method. After optimization, the procedure was carried out using the S color parameter, cold light (6500 K), 7 cm distance between sample and camera, and a solution volume of 1.5 mL. The test showed suitable results for precision (RSD < 2.4%) and accuracy (98.4 to 103.8%) when compared to the conventional method. The proposed technique proved to be an innovative alternative to determine total phenolic compounds in routine analysis for different sectors of the food industry, showing good analytical results without requiring sophisticated equipment.

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Section: Introductionmentioning

confidence: 99%

Determination of total phenolic compounds in plant extracts via Folin-Ciocalteu’s method adapted to the usage of digital images

et al. 2022

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“…Additionally, the freshness model of aquatic products was developed by detecting the parameters, including pH, TVB‐N and thiobarbituric acid value (TBAV) by NIRS, indicating NIR spectroscopy combined with the chemometric model could serve as a suitable strategy to address fraud and quality control of aquatic products 153 . To date, NIR has been applied to evaluate the quality of dried fruits, and it showed high sensitivity and accuracy 154 . Although NIRS is unique in predicting the quality of dried aquatic products by offering spectral information of components, it is challenging to provide visualised spatial distribution of nutrients, limiting its wide application.…”

Section: Quality Detection and Prediction By Non‐destructive Monitori...mentioning

confidence: 99%

“…153 To date, NIR has been applied to evaluate the quality of dried fruits, and it showed high sensitivity and accuracy. 154 Although NIRS is unique in predicting the quality of dried aquatic products by offering spectral information of components, it is challenging to provide visualised spatial distribution of nutrients, limiting its wide application.…”

Section: Quality Detection and Prediction By Non-destructive Monitori...mentioning

confidence: 99%

A systematic review of drying in aquatic products

Zeng

Song

Cong

et al. 2023

Reviews in Aquaculture

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Drying is an essential method for the process and storage of aquatic products. With the removal of water, the occurrence of oxidation, hydrolysis and browning reaction also accompanies it. This article reviews the applications of emerging drying methods in aquatic products, emphasising high‐quality drying. In addition, it summarises the effects of the drying process on the quality of aquatic products, including appearance, nutritional components, flavour and microorganisms. Especially, non‐destructively monitoring technologies are introduced and discussed, including near‐infrared spectroscopy, Raman spectroscopy, hyperspectral imaging, low‐field nuclear magnetic resonance and computer vision system, which are applied to detect and predict the quality of aquatic products. A comprehensive review of recent advances in the research of the drying process of aquatic products is presented, and some perspectives are made for future research.

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“…Paz et al (2015) studied açaí (E. oleracea) from the Amazon rainforest and reported 18.08 mg GAE/ g when ethanol (50% v/v) was used as a solvent at 25 °C for 1 h in a shaker. On the other hand, Caramês et al (2020) used aqueous acetone solution (1:1 v/v), with agitation in a vortex for 90 seconds and microwave-assisted extraction for açaí E. oleracea, obtained 11.93 mg GAEq/g. Finally, Bernardes et al (2019) found 1006.77 mg GAE/100 g in açaí E. edulis from Espirito Santo state, when 70% ethanol (1:10 m/v) acidified with hydrochloric acid (HCl) was used as a solvent.…”

Section: Total Phenolic Compounds and Antioxidant Activitiesmentioning

confidence: 99%

Extraction, characterization and antioxidant properties of phenolic compounds in açaí juçara (Euterpe edulis Mart.) from Atlantic Forest

Silva

Sari

Diedrich

et al. 2021

Braz. J. Food Technol.

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The açaí is a popular Brazilian fruit, however, already part of the world's healthy eating habits owing to its antioxidant properties. The study aimed to determine the effect of solvent in extracting phenolic compounds with antioxidant potential in açaí juçara (Euterpe edulis Mart.) using a Completely Randomized Design (CRD). The phenolic compound profile was quantified by High-Performance Liquid Chromatography (HPLC), and the data set was analyzed by Principal Component Analysis (PCA). The PCA was applied to evidence the relationships between the concentration of phenolic compounds and the solvents. Furthermore, the antioxidant activity was also determined by 2,2’-diphenyl-1-picrylhydrazyl (DPPH), 2,2’-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), and Ferric Reducing Antioxidant Power (FRAP) methods. The solvent ethanol: water 70% was more efficient in extracting phenolic compounds with high antioxidant activity. In this extract, salicylic acid was found in high concentrations as well as catechin, epicatechin, and coumaric acid. Based on a consensus that phenolic compounds are associated with the most powerful antioxidant activities of fruits, the “açaí juçara” from the Atlantic Forest is a potential source of polyphenols. They could be used as natural antioxidants for application in the food and pharmaceutical industry in order to substitute the synthetic antioxidants.

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Near infrared spectroscopy and smartphone-based imaging as fast alternatives for the evaluation of the bioactive potential of freeze-dried açai

Cited by 10 publications

References 34 publications

Determination of total phenolic compounds in plant extracts via Folin-Ciocalteu’s method adapted to the usage of digital images

Determination of total phenolic compounds in plant extracts via Folin-Ciocalteu’s method adapted to the usage of digital images

A systematic review of drying in aquatic products

Extraction, characterization and antioxidant properties of phenolic compounds in açaí juçara (Euterpe edulis Mart.) from Atlantic Forest

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