| abstract |
The present invention provides novel, simple and reliable methods for extraction of fat soluble vitamins (FSVs) from a sample matrix obtained from food products (e.g., vitamin-enriched foods and fortified food matrices) or biological samples. In certain aspects, the invention provides solid phase extraction (SPE) methods. In certain embodiments, the invention relates to two-step elution methods, which provide excellent recovery of all fat-soluble vitamins from complicated food matrices (such as, vitamin-enriched foods and fortified food products) or biological samples in a simultaneous manner. In certain embodiments, the invention uses OASIS® materials as sorbent beds for separating and/or extracting FSVs from the sample matrix. |