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

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.