Patent ID: 6770246
Filing Date: 2004-08-03
Classification: B01L,G01N,Y10T

Abstract:
A sorbent cartridge for use in preparing samples for chemical analysis, comprising:a pipette tip having a longitudinal axis and a hollow distal tip with tapered walls defining an interior cavity extending along the axis and having an opening at a distal end of the tip which opening is not covered by a porous barrier; a porous barrier in the tapered cavity placed at a predetermined location in the tip to define a sorbent volume between the barrier, the cavity walls and the opening at the distal end of the tip, the barrier allowing processing fluids to pass through the barrier; and a sorbent material in the sorbent volume and extending from the opening toward the barrier, the sorbent material being selected for use in the chemical analysis and the porous barrier being selected to prevent passage of the sorbent material past the porous barrier and out of the sorbent volume, the sorbent material comprising a plurality of sorbent particles which are capable of being expelled through the opening in the distal end of the tip by pressure.