Preparation and Characterization of Spray-dried Powders from Achyrocline satureioides(Lam.) DC Extracts
✍ Scribed by E. Lemos Senna; P. R. Petrovick; G. Gonzalez Ortega; V. L. Bassani
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 179 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0951-418X
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✦ Synopsis
Two Achyrocline satureioides spray-dried extracts were prepared from 80% ethanol using raw material pretreated with petroleum ether (P1) in one case and nontreated crude vegetable drug (P2) in the other case. The atomization was carried out in a Büchi 190 Mini-spray dryer using colloidal silicon dioxide as technological carrier. The ethanol content was previously reduced to 10% (v/v) in a low pressure distillation system and the extracts were concentrated four-fold. The nonpolar fraction was maintained in a homogeneous suspension by addition of 2% (w/w) polysorbate 80. The main flavonoids in the feed solutions and in the spray-dried powders were assayed by HPLC and their concentrations in the final products, P1 and P2, were 99%-101%. Both spraydried extracts presented good physical properties (hygroscopicity, particle form and size). The results suggest that the petroleum ether treatment of raw material did not influence the technological properties of the final spray dried products.