|MadSci Network: Biochemistry|
Dear Marzieh, You have posed some interesting questions, which I will attempt to answer. First, if a food contains less than 0.5 g of trans fat per serving it can be labeled as containing 0 trans fat. This value was established based on the fact that current analtical methods cannot accurately measure levels of trans fat lower than this. The trans fat content of foods can be measured by gas chromatography or infrared spectrophotometry. Both of these methods require sophisticated instrumentation. Currently, there are no simple methods for measuring the trans fat content of foods. Thus, you would not be able to do this yourself. Listed below are a couple of websites with additional information on trans fat. http://www.cfsan.fda.gov/~dms/qatrans.html http://www.medlabs.com/file.aspx?FilelDs61 Hope this information helps to answer your questions. Al Bushway Professor of Food Science
Try the links in the MadSci Library for more information on Biochemistry.