Determination of silicon in fats and oils by electrothermal atomic absorption spectrometry with in-furnace air oxidation

✍ Scribed by D.A. McCamey; D.P. Iannelli; L.J. Bryson; T.M. Thorpe

• Book ID: 104100372
• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 533 KB
• Volume: 188
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)86036-5

✦ Synopsis

A graphite-furnace atomic absorption spectrometric method is reported for determination of dimethylpolysiloxane (silicone) in edible fats and oils. It incorporates an airoxidation step in the furnace program to reduce matrix interferences. The detection limit is 0.3 mg kg-' in soils, and short-term precision is about 6% at silicone concentrations of 1.7-2.0 mg kg-'. The procedure was successfully applied to a variety of commercial frying fats and oils, to quantify silicone loss during polish filtration during oil manufacture, to quantify sorption of antifoam onto fried food, and to detect fugitive sources of silicone encountered in deep-fat frying operations.