Solvent for gas chromatograpy mass spectometry, and method for determination of fluorine-containing substances on the surface of fluororesin melt-molded products

A qualitative analysis method for fluorine-containing substances contaminating a surface of a fluororesin melt-molded product, comprising:

• dissolving and extracting fluorine-containing substances from a surface of a fluororesin melt-molded product to form an extract solution,
• evaporating to dryness said extract solution thereby obtaining said fluorine-containing substances as a non-volatile residue;
• dissolving said non-volatile residue in a solvent for gas chromatography mass spectrometry comprising a fluorine-containing solvent, and
• subjecting the resultant solution to analysis by gas chromatography mass spectrometry (GC-MS) to obtain a total ion chromatogram (TIC) within a range of a mass number of from 0 to 500 in GC-MS, and performing qualitative analysis from a mass-to-charge ratio (m/Z) of a mass spectrum at each gas chromatograph peak.