Effect of Two Drying Methods on the Quality of Barley Grass Powder

doi:10.3969/j.issn.1673-1689.2015.08.006

Home > Archive>Volume 34, Issue 8, 2015 >822-827. DOI:10.3969/j.issn.1673-1689.2015.08.006

Effect of Two Drying Methods on the Quality of Barley Grass Powder
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                        10.3969/j.issn.1673-1689.2015.08.006
                    
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Using frozen barley leaves as raw material，the effects of vacuum freeze-drying and spray drying on the solubility，bulk density，mean particle size，color difference and the key components of chlorophyll，flavonoids，SOD enzyme activity，and oxidation resistance of barley grass powder were studied in this paper. The results showed that spray-dried barley grass powder has better solubility，higher packing density，smaller mean particle size，and poor color in terms of physical characteristics. However，its content of the chlorophyll and flavonoids，and SOD enzyme activity of spray-dried powder were only 56.7%，68.1%，47.9% of vacuum freeze-dried powder，respectively. Moreover，the reducing power and DPPH· radical scavenging capacity of vacuum freeze-dried barley grass powder were greater than that of spray-dried powder. In summary，in order to get the barley grass powder with small size and good solubility，spray drying was a good choice，whereas vacuum freeze-drying was a suitable choice to obtain a high nutritional value and good color barley grass powder.

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GAO Tian, ZHANG Min, HAN Yubing, HUANG Shaobo. Effect of Two Drying Methods on the Quality of Barley Grass Powder[J]. Journal of Food Science and Biotechnology,2015,34(8):822-827.

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Online: November 28,2015
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