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Food Technology and Biotechnology, Vol. 57 No. 1, 2019.

Original scientific paper

https://doi.org/10.17113/ftb.57.01.19.5945

Physicochemical Properties and Oxidative Stability of Milk Fortified with Spray-Dried Whey Protein Concentrate–Iron Complex and In Vitro Bioaccessibility of the Added Iron

Indrajeet Singh Banjare ; Dairy Chemistry Division, National Dairy Research Institute, P.O. Box 132001, Karnal, India
Kamal Gandhi orcid id orcid.org/0000-0002-2542-2299 ; Dairy Chemistry Division, National Dairy Research Institute, P.O. Box 132001, Karnal, India
Khushbu Sao ; Dairy Chemistry Division, National Dairy Research Institute, P.O. Box 132001, Karnal, India
Sumit Arora ; Dairy Chemistry Division, National Dairy Research Institute, P.O. Box 132001, Karnal, India
Vanita Pandey ; Quality and Basic Sciences, Indian Institute of Wheat and Barley Research, P.O. Box 132001, Karnal, India

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Abstract

In the present study, spray-dried whey protein concentrate–iron (WPC–Fe) complex was prepared using a laboratory-scale spray drier under the optimized conditions of inlet temperature 180 °C, flow rate 2.66 mL/min and total solids 15 % with the objective to make iron compatible with food products. In order to remove the free iron from the bound iron, standardised method involving centrifugation and ultrafiltration was employed. Further, the retentate was subjected to spray drying to produce WPC–Fe complex. Milk fortified with WPC–Fe complex (γ(iron)=15 mg/L) showed non-significant difference in heat stability, rennet coagulation time, colour estimation, curd tension, viscosity and sensory attributes as compared to control milk. In vitro bioaccessibility of iron and induction period of the fat from milk fortified with WPC–Fe complex were found to be slightly higher (p<0.05) than that of milk fortified with iron alone. Therefore, milk can be fortified with up to 15 mg/L iron in the form of WPC–Fe complex without significantly affecting its physicochemical properties.

Keywords

whey protein; iron; spray drying; milk; bioaccessibility; oxidative stability

Hrčak ID:

218877

URI

https://hrcak.srce.hr/218877

Publication date:

29.3.2019.

Article data in other languages: croatian

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