Torch glassware for use with inductively coupled plasma-optical emission spectrometer
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United States of America Patent
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Sep 9, 2003
Grant Date -
Jul 11, 2002
app pub date -
Jan 10, 2001
filing date -
Jan 13, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Torch glassware for use with inductively coupled plasma-optical emission spectrometers is provided. The glassware includes an outer tube and a stream of cool inert gas flowing radially within the inner surface thereof such that the cool inert gas creates a cushion between the tube and hot plasma contained within the stream of cool inert gas. The outer tube includes a sidewall having an open end and having a slot passing therethrough. The slot extends longitudinally along the sidewall from the open end thereof and is defined at least in part by a first longitudinal edge and a second longitudinal edge. The first longitudinal edge is offset radially inwardly from the second longitudinal edge. Stated another way, the tube includes a fixed center, and a distance between the fixed center and the first longitudinal edge is smaller than a distance between the fixed center and the second longitudinal edge.
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