Patent ID: 8598325
Filing Date: 2013-12-03
Classification: A61B,G01N,Y10T

Abstract:
1. A coated solid phase microextraction (SPME) fibre for use in direct immersion SPME of a food matrix that includes carbohydrates, the coated SPME fibre comprising: a SPME fibre having an extractive portion for absorbing a small molecule from the food matrix; and a protective coating that comprises polydimethylsiloxane (PDMS) or polyfluorocarbons and that is between about 10 μm and about 40 μm thick, wherein the protective coating covers the extractive portion of the SPME fiber and wherein the protective coating has an exposed surface that is substantially uniform and substantially smooth, the protective coating reducing adsorption of the carbohydrates onto the SPME fibre and allowing the SPME fibre to extract the small molecule from the food matrix, wherein the substantially uniform, substantially smooth surface of the protective coating has, on average fewer than 2 imperfections greater than 10 nm in length per 1000 nm