What is the proximate compositions of Soybean lecithin? Crude protein, crude lipid, ash....
There are number of publications on soyabean lecithin. You need to check which one is exactly serving your purpose. See following links for details.
http://naldc.nal.usda.gov/download/26685/PDF
http://link.springer.com/article/10.1007/BF02568014#page-2
Bailey's Industrial Oil and Fat Products offers the following information:
[Table 17, pg 377] Approximate Chemical Composition of Natural Commercial
Soybean Lecithin:
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- Soybean oil 35%
- Phosphatidylcholine 16%
- Phosphatidylethanolamine 14%
- Phosphatidylinositol 10%
- Phytoglycolipids and other minor phosphatides and constituents 17%
- Carbohydrates 7%
- Moisture ~1%
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Due to Lecithins being used in a myriad of applications (food and non-food), the specifications may differ greatly between suppliers and manufacturers subject to the application needs. For instance, de-oiled Lecithins (achieved via solvent/acetone extraction) would result in the triglyceride fraction listed above (Soybean oil) to be removed in the final product, effectively raising the phosphatidylcholine fraction from 9-17% in natural lecithins to around 20-23% in de-oiled products (see Bueschelberger et al., 2015.
Source:
Szuhaj, B. (2005). Lecithins. In: F. Shahidi, ed., Bailey's Industrial Oil and Fat Products, 6th ed. Hoboken, N.J.: John Wiley & Sons.
Bueschelberger, H., Tirok, S., Stoffels, I. and Schoeppe, A. (2015). Lecithins. In: V. Norn, ed., Emulsifiers in Food Technology, 2nd ed. West Sussex, UK: John Wiley & Sons.
See following links...........
http://www.fao.org/docrep/t0532e/t0532e02.htm
http://naldc.nal.usda.gov/download/26685/PDF
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