NMR CELL SYSTEM FOR MEASUREMENT OF SUPERCRITICAL FLUID

摘要

PROBLEM TO BE SOLVED: To provide an NMR cell system which prevents the convection at the inside of a cell part and in which a reaction gas or a reaction liquid can be introduced smoothly to the inside of the cell part by a method wherein a pipe which connects a pump system at the outside to the inside of the cell part is installed on a cell holder which is attached to the open end of the cell part which hoses a sample. ;SOLUTION: An intermediate stopper 6 which controls a cell space is inserted to the inside of an NMR cell 5. A prescribed gap is formed between the NMR cell 5 and the intermediate stopper 6. A space 7 in the lower part of the intermediate stopper 6 is made to communicate with an upper-part space 8. A titanium alloy cell holder 9 which is nonmagnetic and which is resistant to a high temperature, a high pressure and a strong acid is installed at the upper end of the NMR cell 5 in such a way that the uniformity of the static magnetic field of an NMR apparatus is not disturbed. By this constitution, the selector valve 12 of a pipe 11 is opened, and the inside of the NMR cell 5 is evacuated by a vacuum pump 13. Then, the selector valve 12 is closed, a selector valve 16 and a selector valve 17 are opened, and a medium such as liquefied carbonic-acid gas, water or the like and a reaction sample can be set simultaneously to the NMR cell 5 by using a pressurization pump 18 and a pressurization pump 19. When their introduction is completed, the selector valves 16, 17 are closed.;COPYRIGHT: (C)2001,JPO