| 摘要 |
PROBLEM TO BE SOLVED: To prevent the deterioration of a filament by judging the presence of the air leak of a vacuum container before lighting the filament of an ionizing chamber. SOLUTION: A vacuum degree estimating arithmetic part 42 receives not only the detection value of the internal gas pressure of a sample gasifying chamber 1 as column inlet pressure from a pressure sensor 14 but also the temperature of a column oven as a column temperature from a temperature sensor 18 and calculates a column flow rate on the basis of a predetermined calculation formula to claculate the vacuum degree estimated value in a vaccum container 31 from the column flow rate and the exhaust amount of a vacuum pump 32. Then, the vacuum degree estimated value based on an ideal condition and the vacuum degree estimated value actually measured by a vacuum degree measuring part 39 are displayed on a display part 44 and a analyzing person on duty compares these values to easily judge the presence of the air leakage of the vacuum container 31. COPYRIGHT: (C)2004,JPO&NCIPI
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