Abstract: An apparatus for establishing a sulfide bath includes a sulfide supply means for introducing sulfide into water for a water bath, a water chemistry monitoring means for monitoring at least a sulfide concentration of water from the water bath, an electronic controller connected with the sulfide supply means and the water chemistry monitoring means, wherein the electronic controller is configured to control the sulfide supply means to regulate the sulfide concentration in the water bath based on input from the water chemistry monitoring means. A variation of the apparatus is portable and can be used in connection with existing water baths. Another variation of the apparatus is for preserving biological materials.

Abstract: An apparatus for establishing sulfide perfusion is described and includes a sulfide supply for introducing sulfide into fluid for perfusion, an apparatus for delivery of the perfusion fluid, a fluid chemistry monitor for monitoring the concentration of sulfide and other components of the perfusion fluid, and an electronic controller connected with the sulfide supply and the fluid chemistry monitor to control the sulfide supply to regulate the sulfide concentration of the perfusion fluid based on input from the fluid chemistry monitor.