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Profiling of volatile and non-phenolic metabolites-Amino acids, organic acids, and sugars of green tea extracts obtained by different extraction techniques
- Source :
- Food chemistry. 296
- Publication Year :
- 2019
-
Abstract
- Volatile compounds and non-phenolic metabolites (amino acids, organic acids, and sugars) of aqueous green tea extracts obtained by ultrasonic extraction (UE), agitation extraction (AE), hot water extraction (HWE), and conventional extraction (CE) were determined using SPME-GC-MS and HPLC, respectively. Significantly higher (P 0.05) yields of volatiles and non-phenolic metabolites were obtained via UE and AE than via HWE and CE. UE, AE, HWE, and CE released 212, 201, 103, and 65 volatiles, respectively. Sum total of amino acid and organic acid in extracts was 54.57, 54.35, 27.11, and 12.67 (mg/100 g), and 5.96, 6.19, 3.81, and 1.68 (mg/100 g) for UE, AE, HWE, and CE, respectively. Volatiles except nitrogen-containing compounds had higher positive correlations with l-theanine, sucrose, malic acid, and catechins yields. Findings of the current study suggest that an efficient extraction technique may significantly increase volatile and non-phenolic metabolite yields in aqueous green tea extract.
- Subjects :
- Metabolite
Malates
Green tea extract
Food chemistry
01 natural sciences
High-performance liquid chromatography
Camellia sinensis
Analytical Chemistry
chemistry.chemical_compound
Sonication
0404 agricultural biotechnology
Amino Acids
Least-Squares Analysis
Chromatography, High Pressure Liquid
Solid Phase Microextraction
Principal Component Analysis
Volatile Organic Compounds
Chromatography
Chemistry
Plant Extracts
010401 analytical chemistry
Discriminant Analysis
Catechin
04 agricultural and veterinary sciences
General Medicine
Theanine
040401 food science
0104 chemical sciences
Hot water extraction
Malic acid
Sugars
Food Science
Subjects
Details
- ISSN :
- 18737072
- Volume :
- 296
- Database :
- OpenAIRE
- Journal :
- Food chemistry
- Accession number :
- edsair.doi.dedup.....a62fa49317cd728b671775b80c04ab49