Sample processor for the automatic extraction of families of compounds from liquid samples and/or homogenized solid samples suspended in a liquid Patent #: 4186187
ApplicationNo. 06/123858 filed on 02/22/1980
US Classes:422/64, Means is turntable (circular)356/312, By electrical resistance heating (e.g., graphite tube)422/102, Container422/63, Sample mechanical transport means in or for automated analytical system436/49, With treatment or replacement of aspirator element (e.g., cleaning, etc.)73/864.16, Piston and cylinder73/864.22With pipette contacting second fluid supply
ExaminersPrimary: Serwin, Ronald
Attorney, Agent or Firm
International ClassG01N 1/00 (20060101)
Foreign Application Priority Data1979-02-27 GB
AbstractAn automatic sample supply apparatus is provided with a delivery tube which aspirates liquid samples from sample containers mounted on a turntable and delivers the samples to a dosing aperture of a graphite tube of an atomic absorption spectrophotometer or to the sample input of other analytical instruments. The turntable also carries at least one flushing discharge container which is of similar form to the sample container, but has an aperture in the side wall. When the turntable is indexed so that the delivery tube enters the flushing discharge container, a solenoid valve is opened to allow a flushing liquid from a container to flow through the delivery tube and into the flushing discharge container. The aperture in the wall of the flushing discharge container is dimensioned so that the flushing liquid will only flow through it when a given head of liquid exists above the top of the aperture.