G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 30/88 (2006.01) G01N 27/62 (2006.01) G01N 30/06 (2006.01) G01N 30/72 (2006.01)
Patent
CA 2710481
Disclosed is a method which can analyze a low-molecular-weight organic compound having 20 or less carbon atoms contained in a water- and oil-repellent composition in a trace amount with high accuracy. Specifically disclosed is an analysis method which comprises the following steps (a) to (c): (a) mixing a water- and oil- repellent composition comprising a medium and a fluorinated polymer dispersed or dissolved in the medium with an alcohol having 1 to 5 carbon atoms, and causing the fluorinated polymer to aggregate, thereby producing a solution containing aggregates of the fluorinated polymer; (b) separating the solution containing the aggregates of the fluorinated polymer into a liquid fraction and a solid fraction, thereby producing a liquid phase; and (c) measuring the concentration of a low-molecular-weight organic compound having 20 or less carbon atoms in the liquid phase by employing LC-MS, LC-MS/MS or GC-MS, wherein the fluorinated polymer has a repeating unit derived from a compound having a perfluoroalkyl group.
L'invention porte sur un procédé d'analyse très précise d'un composé organique de masse moléculaire faible ayant 20 atomes de carbone ou moins, contenu dans une composition hydrofuge et oléofuge sous forme de traces. L'invention porte spécifiquement sur un procédé d'analyse consistant à : (a) mélanger une composition hydrofuge et oléofuge comprenant un milieu et un polymère fluoré dispersé ou dissous dans le milieu avec un alcool ayant 1 à 5 atomes de carbone et à amener le polymère fluoré à s'agréger, ce qui produit une solution contenant des agrégats de polymère fluoré ; (b) à séparer la solution contenant les agrégats du polymère fluoré en une fraction liquide et une fraction solide, ce qui produit une phase liquide ; et (c) à mesurer la concentration d'un composé organique de masse moléculaire faible ayant 20 atomes de carbone ou moins dans la phase liquide avec un LC-SM, LC-SM/SM ou GC-SM, le polymère fluoré présentant une unité de répétition issue d'un composé qui renferme un groupe perfluoroalkyle.
Asahi Glass Company Limited
Smart & Biggar
LandOfFree
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