High-pressure stopped-flow apparatus up to 3 kbar

Abstract
A high-pressure stopped-flow apparatus was constructed which could be operative at hydrostatic pressures up to 3 kbar. Some preparative results on anionic sigma-complex formation reactions are presented up to 1.5 kbar between 2,4,6-trinitrobenzene (I) and hydroxide ion and between compound (I) and sulfite ion in water. It was found that this apparatus was sufficient to follow a chemical reaction whose half-life was longer than several milliseconds.