PROCESS FOR ANALYZING LOW MOLECULAR WEIGHT ORGANIC COMPOUND HAVING AT MOST 20 CARBON ATOMS IN CLOTH MADE OF CHEMICAL FIBERS TREATED WITH WATER AND OIL REPELLENT AGENT
To provide a process, whereby a low molecular weight organic compound having at most 20 carbon atoms present in a trace amount in a cloth made of chemical fibers treated with a water and oil repellent agent, can be accurately analyzed. A process for analyzing a low molecular weight organic compound having at most 20 carbon atoms in a cloth made of chemical fibers treated with a water and oil repellent agent, which comprises (a) a step of dissolving the cloth made of chemical fibers treated with a water and oil repellent agent in a solvent capable of dissolving a resin constituting the cloth, to obtain a solution, (b) a step of mixing the solution with a solvent capable of agglomerating the resin to agglomerate the resin, to obtain a liquid containing a resin agglomerate, (c) a step of subjecting the liquid containing a resin agglomerate to solid-liquid separation to obtain a liquid phase, and (d) a step of measuring the concentration of a low molecular weight compound having at most 20 carbon atoms in the liquid phase by means of a liquid chromatograph-mass spectrometer, a liquid chromatograph-tandem mass spectrometer, a gas chromatograph-mass spectrometer or a gas chromatograph-tandem mass spectrometer.
1 . A process for analyzing a low molecular weight organic compound having at most 20 carbon atoms in a cloth made of chemical fibers treated with a water and oil repellent agent, which comprises the following steps:
(a) a step of dissolving the cloth made of chemical fibers treated with a water and oil repellent agent in a solvent capable of dissolving a resin constituting the cloth, to obtain a solution,
(b) a step of mixing the solution with a solvent capable of agglomerating the resin to agglomerate the resin, to obtain a liquid containing a resin agglomerate,
(c) a step of subjecting the liquid containing a resin agglomerate to solid-liquid separation to obtain a liquid phase, and
(d) a step of measuring the concentration of a low molecular weight compound having at most 20 carbon atoms in the liquid phase by means of a liquid chromatograph-mass spectrometer, a liquid chromatograph-tandem mass spectrometer, a gas chromatograph-mass spectrometer or a gas chromatograph-tandem mass spectrometer.
2 . The process for analyzing a low molecular weight organic compound having at most 20 carbon atoms in a cloth made of chemical fibers treated with a water and oil repellent agent according to claim 1 , wherein the water and oil repellent agent contains a fluoropolymer having repeating units based on a compound having a perfluoroalkyl group.
3 . The process for analyzing a low molecular weight organic compound having at most 20 carbon atoms in a cloth made of chemical fibers treated with a water and oil repellent agent according to claim 1 , wherein the solvent capable of dissolving a resin constituting the cloth made of chemical fibers contains 1,1,1,6,6,6-hexafluoro-2-propanol.
4 . The process for analyzing a low molecular weight organic compound having at most 20 carbon atoms in a cloth made of chemical fibers treated with a water and oil repellent agent according to claim 1 , wherein the solvent capable of agglomerating the resin contains an alcohol having from 1 to 5 carbon atoms.
5 . The process for analyzing a low molecular weight organic compound having at most 20 carbon atoms in a cloth made of chemical fibers treated with a water and oil repellent agent according to claim 1 , wherein the low molecular weight organic compound having at most 20 carbon atoms is a perfluorocarboxylic acid or a perfluoroalkane sulfonic acid.
6 . The process for analyzing a low molecular weight organic compound having at most 20 carbon atoms in a cloth made of chemical fibers treated with a water and oil repellent agent according to claim 1 , wherein the low molecular weight organic compound having at most 20 carbon atoms is a (perfluoroalkyl)ethyl alcohol, a (perfluoroalkyl)ethyl iodide, a (perfluoroalkyl)ethene or a perfluoroalkyl iodide.
7 . The process for analyzing a low molecular weight organic compound having at most 20 carbon atoms in a cloth made of chemical fibers treated with a water and oil repellent agent according to claim 1 , wherein the chemical fibers are polyester synthetic fibers, polyamide synthetic fibers such as nylon, acrylic synthetic fibers made of an acrylonitrile or acrylate as the main material, polyurethane synthetic fibers, cellulose semi-synthetic fibers or regenerated cellulose fibers.
8 . The process for analyzing a low molecular weight organic compound having at most 20 carbon atoms in a cloth made of chemical fibers treated with a water and oil repellent agent according to claim 1 , wherein the chemical fibers are made of a blended yarn with natural fibers.