Effect of Piper guineensees on physicochemical and organoleptic properties of watermelon (Citrulus lanatus) juice stored in refrigerator and ambient

  • Atanda S A Nigerian Stored Products Research Institute (N. S. P. R .i.) 32/34 BarikisuIyede Street, Yaba. P.M.B 12543, Lagos Lagos State
  • Agboola A. A. Nigerian Stored Products Research Institute 32/34 Barikisu Iyede Street off University of Lagos, Road PMB12543 Lagos
  • Adeniyi B. M. Nigerian Stored Products Research Institute 32/34 Barikisu Iyede Street off University of Lagos, Road PMB12543 Lagos
  • Odebunmi B. K. Department of Food Science and Technology Yaba College of Technology PMB 2011 Yaba Lagos
  • Obong R. U. Department of Food Science and Technology Yaba College of Technology PMB 2011 Yaba Lagos
  • Onyekwere J. I. Department of Food Science and Technology Yaba College of Technology PMB 2011 Yaba Lagos

Abstract

Extracted juice from watermelon containing 0.01gPiper guineensesstored in refrigerator (6±2 oC) and on the shelf (28±1oC) usingpolyethylene bottles was evaluated for physicochemical and organoleptic changes. pH, total soluble sugars, titratable acidity and organolepticevaluation of the juice was carried out till deterioration sets in. Results showed that the sample stored in therefrigerator kept for 7 days while the sample on the shelf lasted for 3 days. pH value decreased from 5.40 to 4.80 and 5.70 for the samplestored in the refrigerator and on the shelf respectively while TSS increased from 0.064%Brix to 0.435% Brix and 0.578%Brix for sample stored in refrigerator and shelf respectively. Titratable acidity decreased from 2.90 % to 0.20% and 0.50% for samples for the juice stored in the refrigerator and on shelf respectively.All these changes were statistically significant (p<0.05).The sample stored on the shelf lost its organoleptic qualities on the third day with an average value less than 2 for taste, smell and colour. However, the juice stored in the fridge lost its organoleptic qualities at the 7th day with an average value of 3.0, 2.90 and 2.80 for taste, smell andcolour respectively.  From the results, juice extracted from water meloncannot be kept at ambient temperature beyond 3 days without proper refrigeration and an additive. This calls for alternative way of extending its shelf life in the absence of electricity supply using local spice like P. guineenses and to make it available during off season.

Published
2015-10-11
How to Cite
A, Atanda S et al. Effect of Piper guineensees on physicochemical and organoleptic properties of watermelon (Citrulus lanatus) juice stored in refrigerator and ambient. Research Journal of Phytomedicine, [S.l.], v. 1, n. 2, p. 53-55, oct. 2015. Available at: <http://asdpub.com/index.php/rjp/article/view/251>. Date accessed: 25 june 2017.
Section
Original Articles

Keywords

shelf life, organoleptic, physicochemical, watermelon, piper guineenses