Pill-box cuvette

A different approach from using a pill-box cuvette is one in which a metal block contains a machined-out cuvette that is placed in the cell compartment of a spectrophotometer, and the pressure is applied directly to the reacting solution.82 The metal block contains two sapphire windows for observation purposes. Reactions that are sensitive to the metal of the constructed cuvette could not be used with this arrangement. 

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