Device for handling liquids for analytical purposes
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United States of America Patent
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Mar 4, 2003
Grant Date -
N/A
app pub date -
Sep 17, 1996
filing date -
Mar 17, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for handling flowing liquids for analytical purposes such as for introduction of liquid samples in atomic spectroscopy and carrying out a continuous flow digestion process at high temperture and pressure. The appaartus comprises a high-pressure pump for conveying a liquid from a reservoir into a tube having an elongate cavity connected to the high-pressure pump outlet. A heating device is arranged so as to heat the liquid in the cavity to a predetermined temperature and a restrictor is arranged downstream of the cavity at the opposite end of the tube. The restrictor is dimensioned relative to the conveying capacity of the high-pressure pump so that liquid in the cavity is maintained at a pressure which is higher than the saturated vapor pressure of the liquid at the predetermined temperture such that no vapor forms within the cavity. When used for introducing samples in spectroscopy, the liquid is a sample which, forming an aerosol, emerges from the restrictor in the form of an aerosol. The arrangement can also be used for solubilizing liquid samples, the liquid being formed by a sample liquid mixed with a solubilizer.
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