Abstract
In this work the spray drying of the fresh stevia leaves aqueous extract
without encapsulating agents was carried out. The effect of the inlet air
temperature (160-200 ºC) and the feed flow rate (2-3 kg/h) on the total
phenolic content, the total flavonoid content and the antioxidant capacity
were evaluated using Folin-Ciocalteau, aluminum chloride and DPPH
methods respectively. The inlet air temperature had a significant effect on all
parameters evaluated that showed a decrease when increasing the inlet air
temperature, the feed flow rate had a significant effect on total flavonoids
content and the antioxidant capacity, by increasing the feed flow rate the
inhibition of the DPPH radical decreased and the total flavonoid content
increased. The treatment at 160 ºC and 3 kg/h retained highest total
flavonoid content and the antioxidant capacity.
without encapsulating agents was carried out. The effect of the inlet air
temperature (160-200 ºC) and the feed flow rate (2-3 kg/h) on the total
phenolic content, the total flavonoid content and the antioxidant capacity
were evaluated using Folin-Ciocalteau, aluminum chloride and DPPH
methods respectively. The inlet air temperature had a significant effect on all
parameters evaluated that showed a decrease when increasing the inlet air
temperature, the feed flow rate had a significant effect on total flavonoids
content and the antioxidant capacity, by increasing the feed flow rate the
inhibition of the DPPH radical decreased and the total flavonoid content
increased. The treatment at 160 ºC and 3 kg/h retained highest total
flavonoid content and the antioxidant capacity.
| Original language | Spanish (Mexico) |
|---|---|
| Pages (from-to) | 873-878 |
| Number of pages | 6 |
| Journal | Proceedings of 21st International Drying Symposium. 978-84-9048-688-7 |
| State | Published - 7 Sep 2018 |