Autosampler seal pack for reducing a carryover percentage
AssigneeWaters Technologies Corporation
InventorsJoshua A. Burnett, Marc E. Lemelin, Sylvain Gilles Cormier
Life of this patent
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Abstract
A seal pack of a sample manager of a liquid chromatography system having a plurality of wash flow pathways fluidically connected to a central pathway that accommodates a sample needle, wherein a first wash flow pathway is vertically offset from a second wash flow pathway, such that a wash solution flows axially along an exterior surface of the sample needle in a vertical direction to wash the sample needle when flowing from the first wash flow pathway to the vertically offset second wash flow pathway, is provided. Furthermore, an autosampler and associated methods are also provided.
Claims10
A seal pack of a sample manager of a liquid chromatography system, the seal pack comprising:
- a first plurality of wash flow pathways disposed in an upper portion of the seal pack and fluidically connected to a central pathway, wherein the first plurality of wash flow pathways includes a first wash flow pathway vertically offset from a second wash flow pathway, such that a wash solution flows axially along an exterior surface of the sample needle at a first area of the sample needle in a vertical direction to wash the sample needle when flowing from the first wash flow pathway to the vertically offset second wash flow pathway;
- and
- a second plurality of wash flow pathways disposed in a lower portion of the seal pack and fluidically connected to the central pathway, wherein the second plurality of wash flow pathways includes a first wash flow pathway vertically offset from a second wash flow pathway, such that the wash solution flows axially along the exterior surface of the sample needle at a second area of the sample needle in the vertical direction to wash the sample needle when flowing from the first wash flow pathway to the vertically offset second wash flow pathway.
A seal pack of a sample manager of a liquid chromatography system, the seal pack comprising:
- a plurality of wash flow pathways fluidically connected to a central pathway that extends vertically through the seal pack to permit a sample needle to enter the seal pack at one end and exit the seal pack at an opposing end, wherein a first wash flow pathway is vertically offset from a second wash flow pathway, such that a wash solution flows axially along an exterior surface of the sample needle in a vertical direction to wash the sample needle at a first subsection of the sample needle when flowing from the first wash flow pathway to the vertically offset second wash flow pathway;
- and
- a connecting wash flow pathway fluidically connecting the plurality of wash flow pathways to another plurality of wash flow pathways configured to wash the sample needle at a second subsection of the sample needle that is separate from the first subsection of the sample needle;
- wherein the seal pack accommodates the sample needle during an injection process of a sample.
Dependencies are inferred from the claim text.