Reduction of the nitrate content in baby spinach leaves by vacuum impregnation with sucrose

Research output: Contribution to journalArticle

Abstract

Vacuum impregnation (VI) has been widely utilized as a pre-treatment method prior to, e.g., the minimal processing, freezing, or drying of foods. In many cases, VI has been used to focus on the enrichment of fruits and vegetables with probiotics or micronutrients, texture enhancement, the modification of the sensory attributes, and extension of shelf life by pH reduction. However, little attention has been paid to the exploration of the metabolic consequences of VI that could lead to changes in the quality characteristics of plant tissues. Since nitrate has long been discussed as a compound that is harmful to human health, the aim of this investigation was to reduce the nitrate content in spinach leaves by feeding sucrose into the tissue using VI. The leaves, either non-treated or treated with VI, were stored under saturated humidity conditions and in darkness at 8 °C, for up to 72 h. VI-treated leaves showed a remarkable reduction in nitrate content as compared to the non-treated samples. Upon storage, sucrose was reduced, indicating that this sugar had been respired and had induced metabolization of the stored nitrate. The nitrite content of the treated leaves was unaffected, proving that this toxic compound was not accumulated in the baby spinach leaves upon external sucrose feeding.

Details

Authors
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Food Engineering

Keywords

  • Sucrose feeding, Nitrate, Metabolism
Original languageEnglish
Pages (from-to)1358-1366
JournalFood and Bioprocess Technology
Volume9
Issue number8
Publication statusPublished - 2016 Aug
Publication categoryResearch
Peer-reviewedYes

Related research output

Liyana Yusof, N., 2017 Jun 14, Lund: Department of Food Technology, Lund University. 114 p.

Research output: ThesisDoctoral Thesis (compilation)

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