Titrimetric Determination of Ascorbic Acid with 2,6-Dichlorophenol Indophenol in Commercial Liquid Diets

Hughes, D. E.

doi:10.1002/jps.2600720208

Cited by 47 publications

(16 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Total polyphenol content was determined in the supernatants by the Folin-Ciocalteu method [36]. The quantitative determination of ascorbic acid in the tested extracts was performed by the oximetric method [37]. The content of anthocyanins was determined by the Fuleki and Francis method [38].…”

Section: Methodsmentioning

confidence: 99%

Preparation of Nanosilver and Nanogold Based on Dog Rose Aqueous Extract

Pulit

Banach

2014

Bioinorganic Chemistry and Applications

View full text Add to dashboard Cite

This paper describes a process of obtaining nanosilver and nanogold based on chemical reduction using substances contained in the aqueous extract of dog rose (Rosa canina). The resulting products were subjected to spectrophotometric analysis (UV-Vis), and testing of the nanoparticles' size and suspension stability was carried out by measuring the electrokinetic potential, ζ, via dynamic light scattering (DLS). Solid samples were imaged by scanning electron microscopy (SEM). The obtained data were given to statistical analysis in order to illustrate the properties of the suspension depending on the values of the input parameters: metal salts concentration, pH of the reaction mixture, and process temperature. In the course of the work, samples of nanosilver and nanogold were obtained, which were stable for over two months and which had a monomodal particle size distribution.

show abstract

Section: Methodsmentioning

confidence: 99%

Preparation of Nanosilver and Nanogold Based on Dog Rose Aqueous Extract

Pulit

Banach

2014

Bioinorganic Chemistry and Applications

View full text Add to dashboard Cite

show abstract

“…The ascorbic acid content in the fresh and freeze-dried products was determined by 2,6-dichlorophenol-indophenol visual titration method (Hughes 1983). The reagents used were 3% meta-phosphoric acid (HPO 3 ) solution, ascorbic acid standard containing 0.1 mg L-ascorbic acid in 1 mL of 3% HPO 3 and the dye solution containing 50 mg of 2,6-dichlorophenol-indophenol in 200 mL of distilled water.…”

Section: Vitamin Cmentioning

confidence: 99%

Foam‐mat Freeze‐drying of Apple Juice Part 2: Stability of Dry Products During Storage

Raharitsifa¹,

Ratti

2010

J Food Process Engineering

View full text Add to dashboard Cite

Sorption isotherms at 5, 20 and 35C and glass transition temperature as a function of water content were evaluated for foamed (3% egg white and 1% methylcellulose) and nonfoamed freeze‐dried apple juice by using the static gravimetric method and differential scanning calorimetry, respectively. Equilibrium isotherms were fitted to the Guggenheim–Anderson–de Boer equation, whereas glass transition temperature to the Gordon–Taylor model. After freeze‐drying at 20C during 48 h, the dry products were stored at different temperatures (5 and 20C) under ambient conditions or vacuum. The nutritional, physical and structural properties were assessed before and at the end of the freeze‐drying process and after storage by determining vitamin C content, solubility, color and microstructure. Freeze‐dried nonfoamed juice retained more vitamin C and was more soluble than foamed products after freeze‐drying. However, foam‐mat juice powders presented higher stability during storage at 20C, which agreed with their higher values of glass transition temperature. Freeze‐dried juice stored at this temperature collapsed showing a decrease in solubility and a marked color change. PRACTICAL APPLICATIONS Quality of dry products depends largely on how they are stored (relative humidity, temperature, presence of light and vacuum). Degradation of flavor, color and texture occur under adverse storage conditions. Nutritional compounds such as vitamins or unsaturated fats could also be negatively affected because of oxidation reactions, which could be a function of the dehydration method or the pretreatment used to manufacture the dry product. The determination stability and quality degradation of foamed and nonfoamed apple juice products during freeze‐drying and storage of the dry products will complete the evaluation of foaming as a potential pretreatment for freeze‐drying.

show abstract

“…The total protein content of the diluted honey samples was determined by Lowry's method of protein estimation using bovine serum albumin (Sigma, USA) as standard 15 . The ascorbic acid content was determined by Bessel's titrimetric method using 2,6-dichlorophenol indophenol (Sigma, USA) as the dye and standard ascorbic acid 16 . Total phenolics content of the honey samples were measured as mg gallic acid equivalence using a previously described modified spectrophotometric Folin-Ciocalteu method 17 .…”

Section: Basic Physicochemical Analysismentioning

confidence: 99%

Antibacterial Activity and Physicochemical Properties of Florally Diversified Bangladeshi Honeys

Mukti

Chowdhury

Nahid

et al. 2018

Bangla. J. Microbiol.

View full text Add to dashboard Cite

Seven florally diversified Bangladeshi honey samples were assessed for their physicochemical properties as well as their antibiogram profile on different human pathogenic bacterial strains. The average density, total protein content, ascorbic acid content, total phenolics content and the total antioxidant capacity of these honeys were determined as 1.50±0.09 g/ml, 5.63±1.56 mg/g, 91.87±22.16 mg/g, 571.04±289.02 mg gallic acid equivalent/gram, and 320.74±55.06 mg ascorbic acid equivalent/gram of samples, respectively. A significant correlation between the phenolics content and the total antioxidant capacity was observed in commercially available honey samples. However, the natural honey samples showed the best antibacterial activity against different pathogenic multidrug-resistant bacterial strains. Significant antibacterial activities were observed against Klebsiella pneumoniae, Salmonella typhi, Micrococcus luteus, Pseudomonas spp. and Enterobacter spp. and moderate antibacterial activities was observed on Shigella boydii, Bacillus cereus, Bacillus megaterium, and Bacillus subtilis. The antibacterial activity was correlated with the total antioxidant capacity. This study suggested that the Bangladeshi multifloral honeys have clinical potential against multidrug-resistant pathogenic bacterial strains. Bangladesh J Microbiol, Volume 33, Number 1-2, June-Dec 2016, pp 5-9

show abstract

Titrimetric Determination of Ascorbic Acid with 2,6-Dichlorophenol Indophenol in Commercial Liquid Diets

Cited by 47 publications

References 17 publications

Preparation of Nanosilver and Nanogold Based on Dog Rose Aqueous Extract

Preparation of Nanosilver and Nanogold Based on Dog Rose Aqueous Extract

Foam‐mat Freeze‐drying of Apple Juice Part 2: Stability of Dry Products During Storage

Antibacterial Activity and Physicochemical Properties of Florally Diversified Bangladeshi Honeys

Contact Info

Product

Resources

About