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Method and apparatus for open digestion of specimens utilizing inclined container support means with electric heater

  • US 5,306,896 A
  • Filed: 06/22/1992
  • Issued: 04/26/1994
  • Est. Priority Date: 06/22/1992
  • Status: Expired due to Fees
First Claim
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1. Apparatus for use in the digestion/concentration treatment of a liquid specimen, which treatment includes subjecting the specimen to a heating operation while contained in a vessel comprising an open top elongated encircling wall body, said body having a generally uniform cross section of predetermined area which defines a liquid surface expanse of corresponding area for an initial volume of liquid specimen contained in the vessel when the vessel is in upright position, the apparatus comprisingan upright frame,means on the frame for supporting at least one liquid specimen-containing vessel thereon, anda heater carried on the upright frame and positioned to direct a heat output therefrom against a defined heat transfer area on the vessel body wall which heat transfer area partly encircles the body wall and extends longitudinally therealong from a first location proximal but spaced from a vessel bottom to a second wall location remote from said bottom, the support means supporting the vessel in a position inclined at an angle of about 45 degrees relative to a horizontal datum so that the liquid surface expanse of an initial specimen volume is greater than the said corresponding area and the body wall overlays the liquid surface and in which position substantially all the initial specimen volume will be in contact with the defined heat transfer area, heat output from the heater transferring through the heat transfer area to heat the liquid specimen and reducing the level thereof between said first and second locations, reduction of said level diminishing the heat transfer area in contact with the liquid and correspondingly diminishing evaporation rate so that a time for the liquid surface level to reduce to said first location is prolonged as the level approaches said first location.

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