A new high-pressure cell for differential pressure-jump experiments using optical detection

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Abstract
A differential pressure‐jump autoclave with optical detection is described, which is capable of performing pressure jumps of about 150‐bar amplitude to either lower or higher pressures within the absolute pressure range up to 2.5 kbar. The principle of a rupture diaphragm is applied and the mechanical relaxation time of the apparatus is about 0.1 ms. Optical detection either of transmitted light or scattered light under an angle of 90° can be utilized to follow the progress of a chemical reaction. A test of appliction is given for the reaction of Ni with Murexide in aqueous solution.