Measuring cell
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United States of America Patent
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-
May 6, 2003
Grant Date -
Jul 12, 2001
app pub date -
Dec 27, 2000
filing date -
Jan 11, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A measuring cell is formed of base plates joined together. A passage groove is formed on a joining surface of one base plate. Through-holes for introducing and discharging a fluid sample are formed on the other base plate, and the joining surface is provided with an optically opaque Si film as slits. Further, the joining surfaces of the base plates and the inner surface of the passage groove are covered with SiO.sub.2 films. Thus, a measuring cell having a sufficiently small passage sectional area, a high air-tightness, a chemically stable measuring chamber, and a high measuring sensitivity can be obtained.
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