Lecithins grade lecithin

The phospholipids in rice oil are similar in composition to other oil sources. These may be recovered as rice lecithin (5). Production of food-grade lecithin requires... 

FOOD-GRADE LECITHIN PRODUCTS, USES 5.1. Functionality... 

Standard-grade (crude) lecithins are excellent water-in-oil emulsifiers. However, modified lecithins can function to emulsify either water-in-oU or oil-in-water emulsions, depending on the type of lecithin modification and the specific parameters of the system. These system parameters can include pH, types of components, component ratios, solids content, and others. Unlike crude lecithins, hydroxylated lecithins are stable in acid systems (pH 3.5). Fractionated lecithins can be manufactured for specific emulsion types. As lecithin s emulsifying activity is partially dependent on its phospholipid ratio, changing the ratio can alter its emulsifying capabilities (7). 

Solubilization. Most lecithins can aid in the production of microemulsions, an example being oil-soluble flavors in aqueous systems. Although standard-grade lecithins do not disperse in water, many modified or fractionated lecithins are water-dispersible, and they can be used to produce microemulsions. Standard-grade lecithin can be blended with other surfactants (e.g., ethoxylated monoglycerides) to produce synergistic emulsifier blends that are also effective in producing microemulsions. 

Fluid or waxy lecithin grades should be stored at room temperature or above temperatures below 10°C may cause separation. 

All lecithin grades should be stored in well-closed containers protected from light and oxidation. Purified solid lecithins should be stored in tightly closed containers at subfreezing temperatures. 

CENTRAL SOYA CENTRAL SOYA Lecithins (Continued) Special Grade Lecithins (Continued) ... 

In the USA single bleached grade lecithin (with H2O2) with a POV maximum of 100 meq/kg can be legally used in food applications. The US double bleached grade is usually bleached with a high hydrogen peroxide concentration or benzoyl peroxide for technical appUcations. 

Table 10.8 Legal purity specifications of food grade lecithin...

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