2012 ©
Journal Publication
Title of Article Determination of ascorbic acid and total phenolics related to the antioxidant activity of some local tomato (Solanum lycopersicum) varieties 
Date of Acceptance 6 April 2015 
     Title of Journal Der Pharma Chemica 
     Standard SCOPUS 
     Institute of Journal Der Pharma Chemica 
     ISBN/ISSN 0975-431X 
     Year of Publication 2015 
     Page 66-70 
     Abstract The present study was aimed to determine ascorbic acid, total phenolics and antioxidant activity of five local tomato varieties available in fresh markets, namely “Rashinee”, “Puang”, “Sida”, “Tou” and “Cherry”, under optimum conditions of 2,6-dichlorophenolindophenol, Folin-Ciocalteu reagent and 2,2-diphenyl-picrylhydrazyl radical methods, respectively. Fresh tomato fruits were homogenized and kept as a freeze-dry powder prior to be extracted with methanol, ethanol and deionized water using ultrasonicator as a green extraction method. It was found that the methanol extracts of these samples gave rather higher antioxidant activities (171.6-197.1 mg BHT/100 g dry weight) and total phenolics (302.3-349.7 mg GAE/100 g dry weight) than those of both ethanol and aqueous extracts. It is evident that the total phenolics contents relate well with its corresponding antioxidant activity for all tomato varieties. However, the ascorbic acid contents (37.6-62.9 mg/100 g dry weight) of the aqueous extract could be cooperated as the synergistically reducing factor. 
     Keyword antioxidant activity, total phenolics, ascorbic acid, tomato 
555020148-1 Mrs. PORNTHIP BOONKASAME [Main Author]
Science Master's Degree
Science Doctoral Degree

Reviewing Status มีผู้ประเมินอิสระ 
Status ตีพิมพ์แล้ว 
Level of Publication นานาชาติ 
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