Low carryover pipette probe
US5468453A · kind A · utility
36Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1993 |
| Grant date | Nov 21, 1995 |
| Priority date | — |
| Expiry date | Jun 14, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/2575
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved pipette probe in an automated chemical analysis system is provided, along with a pipette tip wash protocol to reduce carryover. The pipette tip comprises an elongated stainless-steel barrel which houses a polytetrafluoroethylene tube. The non-wettable properties of polytetrafluoroethylene inhibit fluid adhesion and thereby reduce carryover. The pipette tip is swaged at a fluid dispensing end to a restrictive diameter for good pipetting precision and accuracy. A novel wash protocol is also provided which includes a novel wash solution comprising quantities of Triton X-100 nonionic detergent, Diethanolamine, and NaCl.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.