search for




 

Physicochemical Properties of Liquid Infant Formula Stored at Different Temperatures
Korean J. Food Sci. An. 2018;38:995-1007
Published online October 31, 2018;  https://doi.org/10.5851/kosfa.2018.e31
© 2018 Korean Society for Food Science of Animal Resources

Chan Won Seo, Shik Hong, Yong Kook Shin, and Shin Ho Kang*

R&D Center, Seoul Dairy Cooperative, Ansan 15407, Korea
Correspondence to: Shin Ho Kang
R & D Center, Seoul Dairy Cooperative, Ansan 15407, Korea
Tel: +82-31-481-0110
Fax: +82-31-491-9179
E-mail: shkang@seoulmilk.co.kr
Received July 6, 2018; Revised August 6, 2018; Accepted August 6, 2018.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Changes in the physicochemical properties of ready-to-feed liquid infant formula (LIF) stored at different temperatures (10, 20, 30, and 40℃) for 6 mon, focusing on 5-hydroxymethylfurfural (HMF) content, color, pH, fat globule size distribution, and rheological properties were determined. The HMF content increased with storage time,and LIF stored at 40℃ had a higher HMF content than that of LIF stored at 10℃. The lightness (L*) decreased while redness (a*) and yellowness (b*) increased with increasing HMF content. The fat globule size and pH of LIF stored at 10℃ did not change. However, in the case of LIF stored at 30℃ and 40℃, the fat globule size increased and the pH decreased during storage for 6 mon. LIF stored at 40℃ had a higher apparent viscosity (ηa,10) than that of LIF stored at 10℃, and the shear-thinning behavior of LIF stored at higher temperature was stronger than that of LIF stored at low temperature. The physicochemical changes of LIF during storage were accelerated by Maillard reaction (MR) at higher storage temperatures. Therefore, even if LIF isaseptically manufactured, we recommend that sterilized LIF should be stored at low temperature in order to minimize quality changes during storage.
Keywords : liquid infant formula, storage temperature, 5-hydroxymethylfurfural, Maillard reaction, rheological properties


October 2018, 38 (5)