Dietary fiber and, analysis

Nutrient analysis of stabilized rice bran and its derivatives indicates that it is a good source of protein, dietary fiber and carbohydrates, in addition to several valuable phytonutrients, antioxidants, vitamins and minerals (Table 17.1). SRB and its water-soluble and water-insoluble derivatives contain all the nutrients at different levels. They are gluten and lactose free and do not give rise to any food allergy. 

Selvendran, R.R. B.J.H. Stevens M.S. Du Pont. Dietary fiber chemistry, analysis, and properties. 

A general procedure caimot always be applied for a particular component such as dietary fiber and vitamins. Special attention should be paid to these components a sample should be ground as finely as possible for dietary fiber analysis, and light and oxidation should be avoided for vitamin analyses. 

Carbohydrate analysis is of great importance in the food sciences because of the significant role of polysaccharides as macronutrients, as major constituents of dietary fiber, and as food structure components contributing to textural properties, and food additives. Because of structural similarities between... 

Henshall, A., High-performance anion exchange chromatography with pulsed amperometric detection (HPAE-PAD) A powerful tool for the analysis of dietary fiber and complex carbohydrates. Complex Carbohydrates in Foods, Cho, S.S., Prosky, L., and Dreher, M. (Eds.), Marcel Dekker, Inc., New York, p. 267, 1999. 

The soluble dietary fiber is not measured in the proximate analysis because crude fiber is the residue obtained after the food sample is subjected to sequential hydrolyses with acid and alkali. The crude fiber clearly underestimates values when compared with other methods of analysis such as dietary fiber and detergent fiber. The acid and neutral detergent fiber analyses were developed to estimate hemicellulose, cellulose, and lignin of forages. 

Saura-Calixto F, Garcia-Alonso A, Goni I and Bravo L. 2000. In vitro determination of the indigestible fraction in foods an alternative to dietary fiber analysis. J Agric Food Chem 48 3342-3347. 

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