Patent · US Expired

Ion-permeable polymer joint for use in capillary electrophoresis

US5169510A · kind A · utility

11Cited by

2References

18Claims

0Family size

Assignee

Oread Laboratories · US

Inventors

Susan M. Lunte · Lawrence, US
Craig E. Lunte · Lawrence, US
Tommy J. O'Shea · Dublin, IE

Key dates

Filing date	Mar 2, 1992
Grant date	Dec 8, 1992
Priority date	—
Expiry date	Mar 2, 2012

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/4473
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Improved capillary electrophoresis (CE) apparatus (10) is provided which includes an intermediate grounding joint (34) serving to isolate delicate electrochemical detectors (32, 54, 58) from the high voltage CE power supply (20). The joint (34) includes a fracture (36) close to the detection end (22) of the apparatus (10) which is covered by a Nafion sleeve (38). The joint (34) is immersed in an ionic buffer reservoir (46) which includes a grounded cathode (48). In fabrication procedures, a capillary tube (12) is scored in proximity to one end (22) thereof, and the Nafion sleeve (38) is slid over the score line. The sleeve (38) is then sealed with epoxy (40, 42) at the ends thereof.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.