Preparation and characterization of water-in-oil emulsions loaded with high concentration of l-ascorbic acid

Khalid, Nauman, Kobayashi, Isao, Neves, Marcos A., Uemura, Kunihiko and Nakajima, Mitsutoshi 2013, Preparation and characterization of water-in-oil emulsions loaded with high concentration of l-ascorbic acid, LWT - food science and technology, vol. 51, no. 2, pp. 448-454, doi: 10.1016/j.lwt.2012.11.020.

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Title Preparation and characterization of water-in-oil emulsions loaded with high concentration of l-ascorbic acid
Author(s) Khalid, NaumanORCID iD for Khalid, Nauman orcid.org/0000-0002-8045-199X
Kobayashi, Isao
Neves, Marcos A.
Uemura, Kunihiko
Nakajima, Mitsutoshi
Journal name LWT - food science and technology
Volume number 51
Issue number 2
Start page 448
End page 454
Total pages 8
Publisher Elsevier
Place of publication London, Eng.
Publication date 2013-05
ISSN 0023-6438
Keyword(s) W/O emulsions
L-ascorbic acid
higher concentration
stability
microstructure
Summary The present study was conducted to encapsulate higher concentration of l-ascorbic acid up to (30 g 100 mL-1) in the dispersed phase of water-in-oil (W/O) emulsions. Their continuous phase contained refined soybean oil or Moringa oleifera oil and a food-grade hydrophobic emulsifier. The volume fraction of the dispersed phase was fixed as to 30%. W/O emulsions with l-ascorbic acid retention greater than 95% were prepared using rotor-stator homogenizer at 7000 rpm for 5 min. The prepared W/O emulsions under this operating conditions had average droplet diameter of 2.0-3.0 μm and coefficients of variation of 13%-22%. All the W/O emulsions were stable for more than 30 days at 4 °C or 25 °C with slight increase in average droplet diameter and without phase separation. Their l-ascorbic acid retentions were 50 g 100 g-1 at 4 °C and 30 g 100 g-1 at 25 °C after 30 days of storage. l-ascorbic acid retention ratio of the prepared W/O emulsions followed first-order kinetics with a good fit.
Language eng
DOI 10.1016/j.lwt.2012.11.020
Field of Research 090802 Food Engineering
0702 Animal Production
0908 Food Sciences
Socio Economic Objective 860105 Nutraceuticals and Functional Foods
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2012, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30086071

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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