Author : Hari Purnomo1, Firman Jaya2* and Simon Bambang Widjanarko3

  1.  Dept.Animal Food Technology, Faculty of Animal Husbandry, Brawijaya University, Malang, East Java,Indonesia.
  2. Alumni Post Graduate Program,Faculty of Agricultural Technology, Brawijaya University, Malang, East Java, Indonesia.
  3. Dept Food Technology, Faculty of Agricultural Technology, Brawijaya University, Malang, East Java, Indonesia

JAHEmadu

ABSTRACT

The thermal processing of 6 minutes and boiling at 100oC gave the best effect of its antioxidant activity of ginger (Zingiber officinale Rosc.) rhizome extracts. Whilst the best functional drink was obtained from the combination of 15 mL honey in 25 mL of ginger water extracts. It had the following properties: free radical scavenger activity of 35.51±0.02%; phenolic total of 1.31±0.018 mg/g; and gingerol content of 0.74±0.010 mg/g; taste score of 4.95; colour score of 7.65; and aroma score of 7.4 by the hedonic scale scoring of 1-9. The analysis with GC-MS identified 1-hexadecene (47.81%); hexadecanoic acid (14.25%); and 9-octadecenoic (15.33%) compounds as antioxidant agents. The FTIR analysis showed that CH2 kel. bid. def. vibration at 816.80 cm-1 wave was found for the hexadecene compound, and OH stretch H-bonded at 2944.13 cm-1 wave were found for the hexadecanoic acid and 9-otadecenoic compounds. It was proven that the functional drink produced by the combination of 15 mL honey in 25 mL of ginger water extracts had been organoleptically accepted by the panelists.

Keywords: ginger rhizome, antioxidant, thermal processing, honey concentration

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* Corresponding author address: lone_manutd@yahoo.com

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