Unavoidable food supply chain waste: acid-free pectin extraction from mango peel via subcritical water

Faraday Discuss. 2017 Sep 21:202:31-42. doi: 10.1039/c7fd00035a.

Abstract

Mango peel is the major by-product of mango processing, and compromises 7-24% of the total mango weight. In this study, pectin was extracted from mango peel waste by using subcritical water extraction (SWE) in the absence of mineral acid. A highest yield of 18.34% was achieved from the Kesar variety and the pectin was characterised using ATR-IR spectroscopy, TGA and 13C solid-state NMR spectroscopy to confirm the structure. The degree of esterification (DE) of the pectin was analysed with both titrimetry and 13C solid-state NMR spectroscopy, and a high DE (>70%) was observed for all three varieties (Keitt, Sindhri and Kesar). This is the first report on acid-free subcritical water extraction of pectin from mango peel, which provides a green route for the valorisation of mango peel waste and contributes to a source of biobased materials and chemicals for a sustainable 21st century.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Food Supply*
  • Mangifera / chemistry*
  • Pectins / chemistry
  • Pectins / isolation & purification*
  • Waste Products
  • Water / chemistry*

Substances

  • Waste Products
  • Water
  • Pectins