scholarly journals Degradation Kinetic Modelling of Ascorbic Acid from Orange Juice

Proceedings ◽  
2020 ◽  
Vol 70 (1) ◽  
pp. 55
Author(s):  
Alina Soceanu ◽  
Nicoleta Matei ◽  
Simona Dobrinas ◽  
Viorica Popescu
Keyword(s):  
Ascorbic Acid ◽  
Vitamin C ◽  
Orange Juice ◽  
Storage Temperature ◽  
Kinetic Modelling ◽  
Activation Parameters ◽  
Graphical Analysis ◽  
State Theory ◽  
Activation Process ◽  
Degradation Kinetic

Vitamin C or ascorbic acid is a basic nutrient, a highly effective antioxidant, widely used as food additive. Therefore, quality control in food industry demands ascorbic acid determination methods. The purpose of this study was to determine vitamin C in natural orange juices by spectrometric and voltammetric methods. Another goal was to determine the kinetic and thermodynamics activation parameters for ascorbic acid degradation in orange juices over time and at different temperatures. It was observed that during storage, ascorbic acid concentrations in orange juices were gradually decreased with time at a rate depending on storage temperature and type of orange juice. The reaction order was determined through integrated graphical analysis where the dependences of ln ct/c0 as a function of time reveals the high values for R2, indicating that the kinetics of the degradation of AA follows first order reaction at both studied temperatures. For studied samples the loss of ascorbic acid was varied between 4.33% and 9.13%. Enthalpy variation (ΔH) and entropy variation (ΔS) of activation process were obtained from the Eyring–Polany model based on transition state theory. The values of activation energy ranged between 7289.24 kJmol−1 and 15689.54 kJmol−1.

Degradation kinetic modelling of ascorbic acid and colour intensity in pasteurised blood orange juice during storage

2015 ◽  
Vol 173 ◽  
pp. 665-673 ◽  
Author(s):  
Hocine Remini ◽  
Christian Mertz ◽  
Amine Belbahi ◽  
Nawel Achir ◽  
Manuel Dornier ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Orange Juice ◽  
Kinetic Modelling ◽  
Colour Intensity ◽  
Degradation Kinetic ◽  
Blood Orange

Total phenol, total flavonoid and ascorbic acid content of Iranian commercial orange juice

2021 ◽  
Author(s):  
Hoda Ashari ◽  
Naficeh Sadeghi ◽  
Mohammad Reza Oveisi ◽  
Mannan Hajimahmoodi
Keyword(s):  
Ascorbic Acid ◽  
Vitamin C ◽  
Acid Content ◽  
Orange Juice ◽  
Ascorbic Acid Content ◽  
Total Phenol ◽  
Spectrometric Method ◽  
Total Phenols ◽  
Significant Difference ◽  
Gallic Acid Equivalent

This study was designed to measure and compare the total phenols, flavonoids and vitamin C contents in four orange juice brands which are commercially available in Iran. Total phenols, flavonoids and ascorbic acid content of 100 samples from four different commercial brands were evaluated by the spectrometric method. The concentration of total phenol in commercial orange juice samples was between 28.39 and 114.20 mg gallic acid equivalent per liter (mg GAE/L). The measured range of total flavonoids was from 12.53 to 32.62 mg quercetin equivalent per liter (mg QE/L) and the content of ascorbic acid in the samples was between 29.95 and 93.08 mg/L. The results showed a significant difference between the four brand`s total phenols, flavonoids and vitamin C level (P< 0.05). According to the found variation among different studied brands, setting a determined amount for the measured parameters is suggested.

scholarly journals Kinetic Performance of Ascorbic Acid Degradation on Local Lemon Juice using Different Packaging Materials at Storage

2019 ◽  
Vol 8 (2S2) ◽  
pp. 192-196
Keyword(s):  
Ascorbic Acid ◽  
Shelf Life ◽  
Storage Temperature ◽  
Ascorbic Acid Content ◽  
Lemon Juice ◽  
Acid Dissolution ◽  
Degradation Kinetic ◽  
Acid Degradation ◽  
Nonenzymatic Browning ◽  
The Stability

Kinetic of ascorbic acid dissolution of vitamin ( C ) in Lemon juice 10 Brix packaged in glass and plastic bottles stored at 20,30 and 40 °C for four months have been investigated .The results showed that increasing temperature and period storage caused decreasing in ascorbic acid content and increasing nonenzymatic browning. The stability of ascorbic acid and reduced of nonenzymatic browning was better in the packed in glass bottles. The results of ascorbic acid degradation kinetic parameter showed that the order of the reaction is First and there was an increasing in rate constant(K)in the case of increasing of the storage temperature and in the samples of glass bottlesk.The activation energy (Ea) decrease in plastic bottles. It was found that the shelf life of samples decreased with increasing the storage temperature .We got in this study the shelf life of ascorbic acid from 0 to 50 0C.

COLOR AND VITAMIN C CONTENT IN MANDARIN ORANGE JUICE AS AFFECTED BY PACKAGING MATERIAL AND STORAGE TEMPERATURE

2009 ◽  
Vol 33 ◽  
pp. 27-40 ◽  
Author(s):  
F. BELTRÁN ◽  
A.J. PÉREZ-LÓPEZ ◽  
J.M. LÓPEZ-NICOLÁS ◽  
A.A. CARBONELL-BARRACHINA
Keyword(s):  
Vitamin C ◽  
Orange Juice ◽  
Storage Temperature ◽  
Packaging Material ◽  
Mandarin Orange ◽  
And Storage

scholarly journals Efecto de la radiación gamma sobre la vitamina C

2019 ◽  
pp. 26-29
Keyword(s):  
Ascorbic Acid ◽  
Vitamin C ◽  
Gamma Radiation ◽  
Orange Juice ◽  
Fruits And Vegetables ◽  
Water Solution ◽  
Initial Content ◽  
Effects Of Radiation ◽  
The One ◽  
Different Doses

Efecto de la radiación gamma sobre la vitamina C Effect of gamma radiation on vitamin C Johnny Vargas R. Instituto Peruano de Energía Nuclear. Av. Canadá 1470 Lima 41 DOI: https://doi.org/10.33017/RevECIPeru2011.0005/ RESUMEN Uno de los compuestos orgánicos más sensibles a la temperatura, almacenamiento y radiaciones es el ácido ascórbico. En una planta de irradiación para el tratamiento cuarentenario, se procesarán frutas y hortalizas frescas; vegetales portadores de vitamina C. Se irradió a una determinada concentración la vitamina C (42,24 mg/100 ml) contenida en 3 diferentes sustratos: en jugo de naranja, en solución de agua y acido ascórbico puro en cristales, diluida posteriormente en agua; se aplicaron diferentes dosis de radiación gamma (0; 0,1; 1,0; y 10 kGy), la tasas de dosis fue 7,433 Gy/min. Los resultados mostraron que los mayores porcentajes de destrucción vitamina C irradiada a las dosis respectivas se presentaron en la solución de vitamina C contenida en agua,(15,62; 64,11 y 84,38 %) debido al efecto indirecto de la radiación gamma, luego en la vitamina C contenida en el jugo de naranja,(5,25; 7,33 y 50,50 %) esto es debido a que los otros constituyentes del jugo de naranja, tienen un efecto protector en la vitamina C contra las radiaciones, la vitamina C en cristales fue la que presentó los menores porcentajes de destrucción (3,13; 4,60 y 6,74%). Las diferentes muestras presentaron un contenido inicial de 42,24 mg de vitamina C por 100 ml del sustrato seleccionado. A la dosis de 0,1 kGy el porcentaje de destrucción en la solución de agua fue de 15,62 % mientras en el jugo de naranja y en cristales fue de 5,25 % y 3,13 % respectivamente; a la dosis de 1 kGy presentaron los siguientes porcentajes de destrucción solución 64,11; jugo 7,33 y cristales 4,60% respectivamente y a la dosis de 10 kGy la destrucción de la vitamina C en solución fue de 84,38; en jugo de naranja 50,50 % y en cristales 6, 79% demostrándose que el tipo de sustrato y la dosis juega un papel importante en los efectos de la radiación sobre la vitamina C. En una planta de irradiación para el tratamiento cuarentenario de frutas y hortalizas frescas se aplicaran dosis alrededor de 0,1 kGy, por lo que las pérdidas en vitamina C serán mínimas. Descriptores: Irradiación, Vitamina C, dosis, tratamiento cuarentenario. ABSTRACT One of the organic compounds more sensitive to temperature, storage and radiation is ascorbic acid. In an irradiation plant quarantine treatment, be processed fruits and vegetables, vegetable carriers of vitamin C. Was irradiated at a given concentration of vitamin C (42.24 mg/100 ml) contained in 3 different media: orange juice in water solution and pure ascorbic acid crystals, then diluted in water, we applied different doses of radiation Gamma (0, 0.1, 1.0, and 10 kGy), the dose rate was 7.433 GY / min.The results showed that higher percentages of vitamin C destruction irradiated to the respective doses were presented in the solution of vitamin C contained in water, (15.62, 64.11 and 84.38%) due to the indirect effect of gamma radiation , then vitamin C contained in orange juice, (5.25, 7.33 and 50.50%) This is because the other constituents of orange juice, have a protective effect of vitamin C against radiation, vitamin C crystals, was the one with the lowest percentages of Destruction (3.13, 4.60 and 6.74%). The different samples showed an initial content of 42.24 mg of vitamin C per 100 ml of the selected substrate. A dose of 0.1 kGy the percentage of destruction in the water solution was 15.62% while in the orange juice and glasses was 5.25% and 3.13% respectively, at a dose of 1 kGy showed the following percentages of destruction solution 64.11; juice crystals and 7.33 respectively 4.60% and the dose of 10 kGy the destruction of vitamin C in solution was 84.38, in orange juice 50.50 % and in crystals 6, 79% demonstrated that the type of substrate and the dose plays an important role in the effects of radiation on vitamin C. In an irradiation facility for quarantine treatment of fruits and vegetables are applied about 0.1 kGy dose, so the vitamin C losses will be minimal. Keywords: Irradiation, Vitamin C, dose, quarantine treatment.

scholarly journals Effect of Resistant Maltodextrin on Bioactive Compounds of Pasteurized Orange Juice

Proceedings ◽  
2020 ◽  
Vol 70 (1) ◽  
pp. 15
Author(s):  
Elías Arilla ◽  
Javier Martínez-Monzó ◽  
Purificación García-Segovia ◽  
Marta Igual
Keyword(s):  
Ascorbic Acid ◽  
Vitamin C ◽  
Antioxidant Capacity ◽  
Bioactive Compounds ◽  
Orange Juice ◽  
Control Sample ◽  
Water Soluble ◽  
Total Phenols ◽  
Total Carotenoids ◽  
Resistant Maltodextrin

Resistant maltodextrin (RMD) is a water-soluble fermentable functional fiber. RMD is a satiating prebiotic, a reducer of glucose and triglycerides in the blood and a promoter of good gut health. It is being incorporated into food is more and more frequently. Therefore, it is necessary to study its possible effects on intrinsic bioactive compounds of food. The aim of this work was to evaluate the effect of RMD addition on the bioactive compounds of pasteurized orange juice with or without pulp. RMD was added in different concentrations: 0 (control sample), 2.5, 5 and 7.5%. This way, for a finished drink portion of 200 mL, 5, 10 or 15 g of RDM would be ingested, respectively; enough to display its prebiotic effect. Ascorbic acid and vitamin C were analyzed by HPLC, whereas total phenols, total carotenoids and antioxidant capacity were measured by spectrophotometry. Orange juice with pulp presented higher values of bioactive compounds and antioxidant capacity than orange juice without pulp. The addition of RMD before the juice pasteurization process protected phenols and carotenoids of the juice. The content of total phenols, total carotenoids, ascorbic acid and vitamin C after pasteurization were higher in samples with RMD, as was antioxidant capacity. Moreover, a higher protective effect of RMD was observed when its concentration in orange juice was higher.

scholarly journals Pendugaan Penurunan Kandungan Asam Askorbat Brokoli(Brasisca oleracea Var. Italica) Selama Penyimpanan Dingin Menggunakan Pendekatan Persamaan Arrhenius

2019 ◽  
Vol 4 (1) ◽  
pp. 638-647
Author(s):  
Abu Bakar ◽  
Kiman Siregar ◽  
Ratna Ratna
Keyword(s):  
Weight Loss ◽  
Ascorbic Acid ◽  
Vitamin C ◽  
Shelf Life ◽  
Brassica Oleracea ◽  
Storage Temperature ◽  
Ascorbic Acid Content ◽  
Hardness Level ◽  
Loss Parameter ◽  
R Value

Menganalisis mutu selama penyimpanan dapat dilakukan dengan mengendalikan kondisi penyimpanan tertentu serta menduga laju penurunan mutu yang terjadi. Penelitian ini bertujuan untuk menduga penurunan kandungan  asam askorbat (Brassica oleracea Var. Italica) selama penyimpanan mengunakan pendekatan persamaan Arrhenius. Brokoli disimpan dengan variasi suhu yaitu suhu 5 ⁰C, 10 ⁰C, dan 20 ⁰C. Analisis dilakukan 3 hari sekali hingga panelis menolak dengan parameter susut bobot, tingkat kekerasan, Klorofil, Kalsium, vitamin C (Asam Asam dan uji organoleptik yaitu warna, rasa, aroma dan tekstur.Model Arrhenius berdasarkan kandungan vitamin C (asam askorbat) menghasilkan umur simpan pada brokoli yaitu pada suhu 5°C dengan kemasan adalah 21 hari dengan nilai R² adalah 0,97, pada suhu 10°C dengan kemasan didapatkan umur simpan 21 hari dengan nilai R² adalah 0,98, pada suhu 20°C didapatkan umur simpan yaitu 6 hari dengan nilai R² adalah 0,97.Perlakuan terbaik pada penelitian ini yang mampu mempertahankan mutu simpan brokoli dan memiliki umur simpan yang lama, yaitu penyimpanan pada suhu 5°C dengan berdasarkan parameter susut bobot terendah sebesar 11,5%, tingkat kekerasan tertinggi sebesar 0,7 kg/cm², penyimpanan suhu 5 °C dengan kemasan 21 hari penurunan kandungan vitamin C (asam askorbat) terendah yaitu 21,2 mg , dan penurunan klorofil sebesar 0,35 mg/1gr.Establishment Of Ascorbic acid Of Broccoli (Brassica oleracea  Var. Italica) , During Storage With Arrhenius ApproachAbstract. Analyzing quality during storage can be done by controlling certain storage conditions as well as suspecting the rate of degradation that occurs. This study aims to estimate the decrease in ascorbic acid content (Brassica oleracea Var Italica) during storage using the Arrhenius equation approach. Broccoli is stored with temperature variations of 5 ⁰C, 10 ⁰C, and 20 ⁰C. Analysis is done every 3 days until panelist refused with weight loss parameter, hardness level, chlorophyll, calcium, vitamin C acid acid and organoleptic test that is color, flavor, aroma and texture. Arrhenius model based on vitamin C content (ascorbic acid) produces shelf life at broccoli ie at 5 ° C with packing is 21 days with R² value is 0.97, at 10 ° C with packaging obtained by 21 days saving life with R² value is0.98, at 20 ° C we have a shelf life of 6 days with R² value is 0.97. The best treatment in this study is able to maintain the quality of broccoli and has a long shelf life, ie storage at 5 ° C based on the lowest weight loss parameter of 11.5%, the highest hardness level of 0.7 kg / cm², storage temperature of  5 ° C with the 21 day packs of decrease in vitamin C content (ascorbic acid) the lowest is 212 mg, and the decrease of chlorophyll by 0.35 mg / 1gr. 

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