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Removal of grit from baby leafy salad vegetables by combinations of sanitiser and surfactant

Citation

Dakwa, V and Eyles, A and Gracie, A and Tamplin, M and Ross, T, Removal of grit from baby leafy salad vegetables by combinations of sanitiser and surfactant, Journal of Food Quality Article 6209806. ISSN 0146-9428 (2019) [Refereed Article]


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Copyright Statement

Copyright 2019 Vongai Dakwa et al. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) http://creativecommons.org/licenses/by/4.0/

DOI: doi:10.1155/2019/6209806

Abstract

Grit composed of dirt, sand and small stones adheres to baby leafy salad vegetables during the growing period and can sometimes be difficult to remove with sanitiser only or tap water. For the first time, the effect of a surfactant, sodium dodecyl sulphate (SDS), alone (0.025, 0.05, 0.1 % SDS) and in combination (0.05 % SDS) with peroxyacetic acid (40 mg L-1, PAA), on grit removal, quality, shelf-life and taste of baby spinach was investigated. Increasing SDS from 0.025 to 0.1 % resulted in a 21-50 % increase in grit removal on spinach and coral lettuce. Overall, SDS treatments had no effect on microbial growth, colour and electrolyte leakage during shelf-life. An increase in bruising, sliming and yellowing scores was also observed regardless of the treatment, reaching an unacceptable score (<3) by day-12 for all samples, however yellowing scores were still within an acceptable range (>3) on d-14. There were no differences in sensorial attributes namely, flavour, aroma and texture, between baby spinach samples treated with PAA alone or in combination with SDS. These results demonstrate that SDS treatment can be used to increase grit removal on baby leafy salad vegetables without compromising quality.

Item Details

Item Type:Refereed Article
Keywords:baby spinach, coral lettuce, grit, peroxyacetic acid (sanitiser), sodium dodecyl sulphate (surfactant), shelf-life, taste
Research Division:Agricultural and Veterinary Sciences
Research Group:Horticultural Production
Research Field:Post Harvest Horticultural Technologies (incl. Transportation and Storage)
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural Crops
Objective Field:Vegetables
UTAS Author:Dakwa, V (Miss Vongai Dakwa)
UTAS Author:Eyles, A (Dr Alieta Eyles)
UTAS Author:Gracie, A (Associate Professor Alistair Gracie)
UTAS Author:Tamplin, M (Professor Mark Tamplin)
UTAS Author:Ross, T (Professor Tom Ross)
ID Code:133794
Year Published:2019
Deposited By:TIA - Research Institute
Deposited On:2019-07-10
Last Modified:2019-12-09
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