Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 2 de 2
Filter
Add more filters










Database
Language
Publication year range
1.
Food Chem ; 273: 115-123, 2019 Feb 01.
Article in English | MEDLINE | ID: mdl-30292356

ABSTRACT

A method using reversed-phase high-performance liquid chromatography with diode array detection (HPLC-DAD) was applied after extraction with acidified methanol, to determine 12 bioactive phenolic compounds in the peel and pulp of the mango fruit (Mangifera indica L.) cultivated in the Bahia, state of Brazil. The proposed methodology was previously fully validated and proven successful in the analysis of methanolic extracts of lyophilized samples. The limits of quantification ranged between 0.78 and 3.14 mg L-1 and the individual recovery values obtained for the spiked samples ranged from 80% to 120%. The results were evaluated using PCA and ANN. The results indicate that the fruits are rich in polyphenols, mainly: ellagic acid, gallic acid, rutin and catechin, which contribute to their greater use as functional foods, natural antioxidants and in the pharmaceutical industry, as well as other applications.


Subject(s)
Food Analysis/methods , Mangifera/chemistry , Neural Networks, Computer , Principal Component Analysis , Antioxidants/analysis , Brazil , Catechin/analysis , Chromatography, High Pressure Liquid , Chromatography, Reverse-Phase , Ellagic Acid/analysis , Food Analysis/statistics & numerical data , Fruit/chemistry , Functional Food/analysis , Gallic Acid/analysis , Phenols/analysis , Polyphenols/analysis
2.
Food Chem ; 273: 15-23, 2019 Feb 01.
Article in English | MEDLINE | ID: mdl-30292361

ABSTRACT

The elemental/centesimal composition of dried fruits and capsules containing Goji berries (Lycium barbarum L.) was evaluated by ICP OES after two digestion procedures. Furthermore, phenolic acid compounds and flavonoids were quantified by HPLC-UV-DAD. Precision, accuracy, LOD and LOQ were evaluated. The samples showed similar contents of proteins, lipids and carbohydrates. The metal contents in the samples were found at different levels (minimum-maximum, in mg kg-1), as follows: Ca (181.1-200.2); Cu (1.703-2.145); Fe (7.420-7.852); K (81.78-83.59); Mg (92.58-95.12); Mn (1.630-2.570); Na (587.9-590.7); P (3.124-3.360); Se (2.812-3.345); V (0.055-0.062) and Zn (2.325-2.610). Al, As, Ba Cd, Co, Ni, P, Pb, Sb, Sn and Sr showed values below the LOD. Accuracy was assessed by analysis of tomato leaves (NIST 1573a). Eight bioactive phenolic compounds (caffeic, chlorogenic, ellagic, ferulic, gallic, p-coumaric, syringic and vanillic acids) and two flavonoids [(+)-catequin and rutin] were determined, in levels of 55.5-83.700 and 172.3-2982.4 mg kg-1, respectively.


Subject(s)
Capsules/analysis , Lycium/chemistry , Phenols/analysis , Trace Elements/analysis , Chromatography, High Pressure Liquid , Flavonoids/analysis , Food Analysis/methods , Food Analysis/statistics & numerical data , Fruit/chemistry , Hydroxybenzoates/analysis , Limit of Detection , Metals/analysis , Micronutrients/analysis , Spectrophotometry, Ultraviolet
SELECTION OF CITATIONS
SEARCH DETAIL
...