Abstract: A sample transport and manipulation system and method for exciting a quantitatively uniform sample for spectrometric analysis over an extended period of time is disclosed. A uniform sample transport medium such as a filament is transported at a uniform rate through an excitation situs which is coincident with the optical input situs of the spectrometer. Means for uniformly depositing a liquid sample over the medium are included to complete the establishment of a system in which the spectrometer is presented with a quantitatively uniform excited sample on a continuous basis.

Abstract: A stabilized cathode assembly for an arc light source is disclosed wherein an unattached end of a length of electrically conducting braid serving as a cathode is held in close proximity to the anode of the source to establish an arc path between the braid end and the anode. Support means are disclosed which function to advance and withdraw the braid to initiate the arc. Application of the assembly in a spectrometer sample excitation device is further disclosed.

Abstract: A sample excitation situs or light source enhancement apparatus for an optical spectrometer comprising a mirror arranged to reflect an image of the excitation situs in close proximity to the actual excitation situs is disclosed.