scholarly journals A Mobile Analytical Device for On-Site Quantitation of Anthocyanins in Fruit Beverages

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 246
Author(s):  
Mohsen Salimi ◽  
Brigitta R. Sun ◽  
Jenny Syl Tabunag ◽  
Jianxiong Li ◽  
Hua-Zhong Yu
Keyword(s):  
Multiple Testing ◽  
Food Industry ◽  
Mobile App ◽  
Molding Method ◽  
Pdms Elastomer ◽  
Individual Reaction ◽  
Total Anthocyanins ◽  
Monomeric Anthocyanins ◽  
Detection Principle

Anthocyanins are antioxidant and anti-inflammatory ingredients in various fruit beverages, for which their conservation and quantitation are important for the food industry. In this paper, we report a simple, portable device for accurate on-site determination of total monomeric anthocyanins in fruit beverages employing a Wi-Fi scanner coupled with a flexible microchip and a free mobile app. The detection principle is based on the pH-induced colorimetric reactions of anthocyanins performed in a specially designed microchip and validated with standard spectrophotometric measurements. The microchip with multiple testing vials was prepared with the benchtop molding method with a common PDMS elastomer and a transparency film; the photo of the scanned microchip is wirelessly sent to a smartphone and the RGB values of individual reaction vials in the microchip are analyzed with a free mobile app to determine the corresponding concentrations. It was demonstrated that the quantitation performance of this POCT device is comparable with conventional spectrophotometry in the determination of total anthocyanins in both standard solutions and fruit beverages.

Characterization of Different Types of Biomass Wastes Using Thermogravimetric and ICP-MS Analyses

2020 ◽  
Vol 70 (12) ◽  
pp. 4594-4600
Keyword(s):  
Thermogravimetric Analysis ◽  
Food Industry ◽  
Wood Waste ◽  
Biomass Ash ◽  
Minor Elements ◽  
Ms Analysis ◽  
Icp Ms ◽  
Different Types

The purpose of this study was to characterize some types of biomass wastes resulted from different activities such as: agriculture, forestry and food industry using thermogravimetric and ICP-MS analyses. Also, it was optimized an ICP-MS method for the determination of As, Cd and Pb from biomass ash samples. The ICP-MS analysis revealed that the highest concentration of metals (As, Cd, Pb) was recorded in the wood waste ash sample, also the thermogravimetric analysis indicated that the highest amount of ash was obtained for the same sample (26.82%). The biomass wastes mentioned in this study are alternative recyclable materials, reusable as pellets and briquettes. Keywords: ash, biomass, ICP-MS, minor elements, TG

scholarly journals Jaboticaba (Plinia jaboticaba (Vell.) Berg) peel flour as an anthocyanin-rich ingredient for the elaboration of sequilho biscuits: Effects on sensory and technological properties

2021 ◽  
Vol 43 ◽  
pp. e55922
Author(s):  
Jéssica Aparecida Ribeiro ◽  
Clarissa Ane Gonçalves ◽  
Jéssica Ferreira Rodrigues ◽  
Natália Manzatti Machado Alencar ◽  
Eleonice Moreira Santos ◽  
...  
Keyword(s):  
Purchase Intention ◽  
Food Industry ◽  
Physicochemical Analysis ◽  
Sensory Characteristics ◽  
Total Flavonoids ◽  
Industrial Processing ◽  
Total Anthocyanins ◽  
Hedonic Scale ◽  
Fruit Flavor ◽  
Instrumental Texture

Jaboticaba (Plinia spp.) peel is an emerging co-product with high levels of flavonoids, anthocyanins, and differentiated sensory characteristics. During the industrial processing of jaboticaba, as in the production of juices, only the pulp is used, and the peel is discarded. This work aimed to produce sequilho biscuits with different concentrations of jaboticaba peel flour (JPF) and evaluate the technological and sensory properties of the products. Biscuits with four concentrations of JPF (B1= 0.75%, B2= 1.5% B3= 2.25% and B4= 3.0%) were prepared. The physicochemical analysis, instrumental texture, color, total flavonoids, and total anthocyanins were evaluated. Sensory perceptions were investigated using the check-all-that-apply (CATA) questionnaire, hedonic scale, and purchase intention scale. Jaboticaba peel flour had high levels of total flavonoids (227.9±14.6 mg 100 g-1) and total anthocyanins (114.2±4.2 mg cyanidin-3-glycoside 100 g-1). Specific volume and bite force were not affected by the addition of JPF. The global impression for all biscuits elaborated with JPF ranged from approximately 6.5 to 7.5. It positively influenced the global impression of the biscuits, with associations with the CATA terms of fruit flavor, jaboticaba flavor, and fruit aroma. However, terms related to the texture, such as fibrous and hard, negatively influenced the global impression. It is recommended to produce sequilho biscuits with JPF addition up to 1.5%. This study demonstrated that the food industry could better exploit the jaboticaba peel, meeting consumer demand for products with differentiated sensory characteristics

Determination of uronic acids in sugarcane bagasse by anion-exchange chromatography using an electrode modified with copper nanoparticles

2015 ◽  
Vol 7 (6) ◽  
pp. 2347-2353 ◽  
Author(s):  
Maísa Azevedo Beluomini ◽  
José Luiz da Silva ◽  
Nelson Ramos Stradiotto
Keyword(s):  
Anion Exchange ◽  
Sugarcane Bagasse ◽  
Copper Nanoparticles ◽  
Food Industry ◽  
Anion Exchange Chromatography ◽  
Exchange Chromatography ◽  
Lignocellulosic Materials ◽  
Uronic Acids

Uronic, d-glucuronic and d-galacturonic acids are found in lignocellulosic materials and are known to be used in the food industry and chemical industries.

Study of Histamine Detection using Liquid Chromatography and Gas Chromatography

2021 ◽  
Vol 16 ◽  
pp. 1-9
Author(s):  
Muhammad Abdurrahman Munir ◽  
Muhammad Mukram Mohamed Mackeen ◽  
Lee Yook Heng ◽  
Khairiah Haji Badri
Keyword(s):  
Gas Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Food Industry ◽  
Hplc Analysis ◽  
Hplc Method ◽  
Chromatography Analysis ◽  
Quantitation Limit ◽  
Satisfactory Recovery

Histamine is a heterocyclic amine shaped by decarboxylation of the histidine. It is a compound that lack chromophore and involatile. However, the detection of histamine is imperative due to the characteristic of histamine has given several disadvantages in food industry. This paper describes methods for histamine detection by employing high performance liquid chromatography and gas chromatography. The derivatization techniques required for both methods in order to increase the sensitivity of chromatography analysis. Two derivatizing agents were applied in this study such as 9-flourenilmethyl chloroformate (FMOC – Cl) for HPLC analysis whereas for GC analysis a N,O-bis (trimethylsilyl)acetamide (BSA) was used. Method validation was in accordance to Commission Decision 657/2002/CE. The validation of specificity, linearity, precision, accuracy, detection limit and quantitation limit results indicate that the methods were acceptable. The linear range for both methods were at 0.16 – 5.00 µg∙mL-1. The determination of histamine using GC showed the superiority of this instrument compared to HPLC. Method applicability was also checked on real sample namely mackerel in order to acquire a satisfactory recovery for both methods.

Determination of Nanomaterials in the Food Industry: An Approach to Safety and Quality

2021 ◽  
pp. 114-121
Author(s):  
L. Gobbi ◽  
L. Mancini ◽  
R. Ruggieri ◽  
M. Tiradritti ◽  
G. Vinci
Keyword(s):  
Food Industry

scholarly journals Biocompounds Content Prediction in Ecuadorian Fruits Using a Mathematical Model

Foods ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 284 ◽  
Author(s):  
Wilma Llerena ◽  
Iván Samaniego ◽  
Ignacio Angós ◽  
Beatriz Brito ◽  
Bladimir Ortiz ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Total Phenolic ◽  
Total Carotenoids ◽  
Physalis Peruviana ◽  
Yellow Orange ◽  
Total Anthocyanins ◽  
The Mathematical Model ◽  
Complex Methods ◽  
Solanum Betaceum

Anthocyanins, carotenoids and polyphenols are biomolecules that give the characteristic color to fruits. Carotenoids relate to yellow, orange and red colors whereas anthocyanins and polyphenols mainly relate to purple and red colors. Presently, standard determination of antioxidants is carried out using relatively complex methods and techniques. The aim of this study was to develop a mathematical prediction model to relate the internal color parameters of the Amazonic fruits araza (Eugenia stipitata Mc Vaugh), Andean fruit blackberry (Rubus glaucus Benth), Andean blueberry (Vaccinium floribundum Kunth), goldenberry (Physalis peruviana L.), naranjilla (Solanum quitoense Lam.), and tamarillo (Solanum betaceum Cav.) to their respective anthocyanins, carotenoids and polyphenols contents. The mathematical model was effective in predicting the total anthocyanins content (TAC), the total carotenoids content (TCC) and finally the total phenolic content (TPC) of fruits assayed. Andean blueberry presented a TPC with an experimental value of 7254.62 (mg GAE/100 g sample) with respect to a TPC prediction value of 7315.73 (mg GAE/100 g sample). Andean blackberry presented a TAC with an experimental value of 1416.69 (mg chloride cyanidin 3-glucoside/100 g) with respect to a prediction TAC value of 1413 (mg chloride cyanidin 3-glucoside/100 g).

scholarly journals Storage stability of anthocyanins in freeze-dried elderberry pulp using low proportions of encapsulating agents

2020 ◽  
pp. 108201322093786
Author(s):  
Rosa Baeza ◽  
Virginia Sánchez ◽  
Gabriel Salierno ◽  
Fabricio Molinari ◽  
Paula López ◽  
...  
Keyword(s):  
Storage Stability ◽  
Free Radical Scavengers ◽  
Oxidation Reactions ◽  
High Concentration ◽  
Stability Parameters ◽  
Color Parameters ◽  
Freeze Dried ◽  
Total Anthocyanins ◽  
Very High ◽  
Monomeric Anthocyanins

Berry fruits are well recognized for health-promoting constituents due to their properties of free radical scavengers which confer antioxidant activity against cellular oxidation reactions. Elderberry fruit contains one of the highest levels of anthocyanins. The objective of this work was to evaluate the storage stability of total monomeric anthocyanins, cyanidin-3-glucoside (one of two major anthocyanins in elderberry), and color parameters in freeze-dried elderberry encapsulated with a low proportion of different carriers (Maltodextrin, Capsul™, Promitor ™, and κ-carrageenan). Encapsulated samples were stored at two different water activities (aw) 0.10–0.20 and 0.43 at 38 ℃ for 90 days and evaluated for the content of monomeric anthocyanins, cyanidin-3-glucoside, color parameters, and physical characteristics. Freeze-dried powders remained free-flowing during storage at 38 ℃ with aw 0.12–0.20, but agglomeration occurred at aw = 0.43. Total anthocyanins and color parameter a* (redness) remained unchanged during storage at the lower aw. Glass transition temperatures (Tg) were determined and mostly correlated with observed physical phenomena. The powders had a very high total monomeric anthocyanin contents as high as 13 mg/g (cyanidin-3-glucoside). The addition of encapsulants in low proportions allowed the researchers to obtain elderberry powders with a very high concentration of total monomeric anthocyanins. aw plays a key role in all stability parameters studied.

Deep eutectic solvent-based extraction coupled with green two-dimensional HPLC-DAD-ESI-MS/MS for the determination of anthocyanins from Lycium ruthenicum Murr. fruit

2018 ◽  
Vol 10 (10) ◽  
pp. 1247-1257 ◽  
Author(s):  
Jun Sang ◽  
Bing Li ◽  
Ya-ya Huang ◽  
Qun Ma ◽  
Kang Liu ◽  
...  
Keyword(s):  
Analytical Methods ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Two Dimensional ◽  
Macroporous Resin ◽  
Esi Ms ◽  
Lycium Ruthenicum ◽  
Total Anthocyanins ◽  
Lycium Ruthenicum Murr

This study aimed to extract and separate total anthocyanins from Lycium ruthenicum Murr. by combining deep eutectic solvents (DES) with macroporous resin chromatography and to develop green analytical methods for the determination of anthocyanins.

scholarly journals Electrodeposition of Pd-Pt Nanocomposites on Porous GaN for Electrochemical Nitrite Sensing

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 606 ◽  
Author(s):  
Rui Xi ◽  
Shao-Hui Zhang ◽  
Long Zhang ◽  
Chao Wang ◽  
Lu-Jia Wang ◽  
...  
Keyword(s):  
Environmental Samples ◽  
Food Industry ◽  
Biological Process ◽  
High Sensitivity ◽  
Good Reproducibility ◽  
Practical Application ◽  
Long Term Stability ◽  
Nitrite Content

In recent years, nitrite pollution has become a subject of great concern for human lives, involving a number of fields, such as environment, food industry and biological process. However, the effective detection of nitrite is an instant demand as well as an unprecedented challenge. Here, a novel nitrite sensor was fabricated by electrochemical deposition of palladium and platinum (Pd-Pt) nanocomposites on porous gallium nitride (PGaN). The obtained Pd-Pt/PGaN sensor provides abundant electrocatalytic sites, endowing it with excellent performances for nitrite detection. The sensor also shows a low detection limit of 0.95 µM, superior linear ampere response and high sensitivity (150 µA/mM for 1 to 300 µM and 73 µA/mM for 300 to 3000 µM) for nitrite. In addition, the Pd-Pt/PGaN sensor was applied and evaluated in the determination of nitrite from the real environmental samples. The experimental results demonstrate that the sensor has good reproducibility and long-term stability. It provides a practical way for rapidly and effectively monitoring nitrite content in the practical application.

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