Filtered Adapter for Pipettors
The present invention relates to an adapter containing a filter that can be used with pipetting devices, particularly robotic pipetting devices, to efficiently connect the pipetting device to pipette tips with minimal distortion of the pipette tip. The present invention also relates to a process and a system of using an adapter containing a filter that can be used with pipetting devices, particularly robotic pipetting devices, to assemble the adapter together with an unfiltered pipette tip on the site of application. The adapter and pipette tip are each stackable for saving space at the work station.
1 .- 14 . (canceled)
15 . An adapter for use with a pipetting device and a pipette tip comprising:
a deformable housing containing non-porous plastic or rubber walls surrounding a lumen;
a filter comprising a sintered porous plastic filter or a fiber filter, wherein the filter is located in the lumen in a manner to provide a barrier to fluid and aerosol.
16 . The adapter of claim 15 , wherein an inner wall of the adapter, an outer wall of the adapter, or both the inner wall and outer wall of the adapter contain a sealing means or a circumferential ridge.
17 . The pipette tip of claim 16 , wherein an inner wall of the pipette tip, an outer wall of the pipette tip, or both the inner wall and outer wall of the pipette tip contains a circumferential indentation or groove.
18 . The adapter of claim 15 , wherein the filter comprises a color change indicator.
19 . The adapter of claim 15 , wherein the filter comprises a self sealing additive.
20 . The adapter of claim 15 , wherein the sintered porous plastic in the filter is sintered porous polyethylene, polypropylene, PVDF or PTFE, or a combination thereof.
21 . The adapter of claim 15 , wherein the adapter is stackable.
22 . A rack containing the adapter of claim 15 .
23 . The rack of claim 22 , wherein the rack is stackable.
24 . A method for performing automated pipetting comprising the sequential steps of:
A) employing a programmable automated pipetting device comprising a plurality of pipette barrels, each barrel operably connected on a first end to a suction means in the pipetting device, and having a second end with an opening;
B) providing a rack of adapters, each adapter containing a deformable plastic or rubber wall, a central lumen, a first end and a second end, the second end containing an opening, wherein the adapter comprises a filter selected from the group consisting of a sintered porous plastic filter and a fiber filter, wherein the filter is positioned in the lumen to provide a barrier to aerosols and liquids;
C) positioning the plurality of pipette barrels over the first ends of the adapters in the rack;
D) simultaneously contacting the second end of each pipette barrel with the first end of each adapter so that the pipette barrel and adapter are engaged;
E) removing the pipette barrels with attached adapters from the rack of adapters;
F) positioning the pipette barrels with attached adapters over a rack of pipette tips with or without filters, each tip having a first end and a second end, the first end having an opening of greater diameter than the second end, each adapter being positioned over the first end of each pipette tip;
G) simultaneously contacting the second end of each adapter with each pipette tip so that the adapter and pipette tip are engaged; and,
H) removing the pipette barrels with attached adapters and pipette tips from the rack of pipette tips.
25 . The method of claim 24 further comprising the sequential steps of:
I) positioning the second end of each pipette tip over a fluid;
J) inserting the second end of each pipette tip into the fluid;
K) aspirating fluid into a reservoir of the pipette tip;
L) removing the pipette tips from the fluid;
M) positioning the pipette tips containing the fluid over a receptacle;
N) ejecting the fluid into the receptacle; and,
O) ejecting the adapters and attached pipette tips from the pipette barrels into a waste receptacle.
26 . The method of claim 24 , comprising repeating the steps A through H.
27 . The method of claim 24 , further comprising the sequential steps of:
I) positioning the pipette barrels over a rack of pipette tips with or without filters, each tip having a first end and a second end, the first end having an opening of greater diameter than the second end, each pipette barrel being positioned over the first end of each pipette tip;
J) simultaneously contacting the second end of each pipette barrel with the first end of each pipette tip so that the pipette barrel and pipette tip are engaged; and,
K) removing the pipette barrels with attached pipette tips from the rack of pipette tips.
28 . The method of claim 27 , further comprising the sequential steps of:
L) positioning the second end of each pipette tip over a fluid;
M) inserting the second end of each pipette tip into the fluid;
N) aspirating fluid into a reservoir of the pipette tip;
O) removing the pipette tips from the fluid;
P) positioning the pipette tips containing the fluid over a receptacle;
Q) ejecting the fluid into the receptacle; and,
R) ejecting the pipette tips from the pipette barrels into a waste receptacle.