Dissociation chamber and measuring cell combination useful for making measurements

In combination, a dissociation chamber and measuring cell useful for observing fluorescence radiation, said combination comprising:

• a heated dissociation chamber adapted to permit hydrides to be passed therethrough with an inert gas flow, said dissociation chamber including a tubular part surrounded by a jacket-shaped heater, said tubular part having, on the outlet side thereof, a ground surface;
• and
• a measuring cell adjacent said tubular part of said dissociation chamber and located downstream thereof, said cell being adapted for passing an excitation light beam therethrough and for observing fluorescence radiation occurring therein, said measuring cell being a block-shaped body and having three mutually perpendicular bores of which:
• the first bore being a through bore communicating on one side thereof with said tubular part of said dissociation chamber and on the other side with an outlet, said first bore having a funnel-shaped ground surface on said one side thereof, said ground surface being complementary to, and engaging with, said ground surface of said tubular part;
• the second bore being a through bore closed on both sides thereof by windows whereby an excitation light beam can be passed therethrough;
• the third bore being closed by a window through which fluorescence radiation can be observed;
• and
• means, axially resilient and engaged with said tubular part, for retaining said ground surface thereof in resilient engagement with said ground surface of said measuring cell.