| 摘要 |
PROBLEM TO BE SOLVED: To perform a detection with sufficient precision by setting the temperature of a separation tube to a specified range when a sample containing polybiphenyl chloride (PCB) is passed in the separation tube. SOLUTION: This methods comprises a carrier gas supplying means 1, a detecting means (radiation source) 3 connected to the carrier gas supplying means 1, a separation tube (column) 4 having one end side connected to the carrier gas supplying means 1 through the detecting means 3, and a recorder 5 connected to the detecting means 3. Further, it comprises a sample injecting means 6, so that the sample injection means 6 supplies a sample containing PCB or a treated insulating oil to a sample injection port 7 provided on one end of the separation tube 4. A flowmeter 8 is connected to the other end of the separation tube 4 through the detecting means. When the sample containing PCG is passed through the separation tube 4 of a gas chromatographic device, the temperature of the separation tube 4 is set to 170-190 deg.C, particularly to 175-185 deg.C.
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