The relative ease of operation, power handling capabilities, and overall performance of an inductively coupled plasma-optical emission spectrometer depends upon numerous factors, not the least important of which is the design of the torch. A variety of such designs has appeared in the literature. Most workers have employed three concentric fused silica and/or Pyrex tubes, referred to as an inner sample gas tube, a "flaired mouth" plasma gas tube, and an outer coolant tube. These tubes are either fused into one- or two-piece units through glass blowing techniques or mounted in some type of dismantleable base assembly.
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