Stopped-flow apparatus

Stopped-flow apparatus for observing and measuring the rates of fast reactions in solutions comprising, in combination, supporting structure, at least one flow assembly on said supporting structure, said flow assembly including a temperature controlled enclosure on said supporting structure, a reaction cell detachably supported within said enclosure, a mixing chamber detachably and operatively connected to said reaction cell, at least two syringe assemblies mounted on said supporting structure and being operatively connected to said mixing chamber, means mounted on said supporting structure to supply said syringes with solutions to be mixed in said mixing chamber, a drive system for said syringes being operatively connected thereto, adjustable stopping means on said support structure operatively connected to said reaction cell, and drain means detachably secured to said reaction cell;

• said mixing chamber, said light source, said detachable means and said drain means all being screw threadably secured to said cell in operative relationship thereto for facilitating connection and disconnection therewith, said mixing chamber including a block, inlet means on one side of said block and outlet means on the other side thereof screw threadably connectable to said cell, said inlet means including means operatively connecting same to each of said syringes, a bifurcated bore in the shape of an inverted V extending from each of said means operatively connecting said inlet means to each of said syringes, each leg of said bifurcated bore communicating at the end thereof with a different side of the inner end of said outlet means and with the end of the leg of the other bifurcated bore to form a first point mixing, one mixing zone upon each side of said inner end of said outlet means, and being substantially diametrically located within said block forming said mixing chamber, the outer end of said outlet means constituting a second point mixing at the area of connection of said outlet means to said cell.