High speed sample supply device
Disclosed herein is a sample supply device that alternates between the supply of samples from one sample line while cleaning a second sample line and then supplying a second sample from the second sample line while cleaning the first sample line. This is repeated in rapid succession to allow greater speed in analyzing a plurality of samples in a shorter amount of time.
1. An apparatus for delivering samples to an instrument for analysis, comprising:
a first sample delivery line, wherein the first sample delivery line comprises a first sample loading and injection branch, a first sample holding loop, and a first control valve located within the first sample delivery line;
a second sample delivery line, wherein the second sample delivery line comprises a second sample loading and injection branch, a second sample holding loop, and a second control valve located within the second delivery line;
a fluid flow management mechanism comprising a position switching valve for alternately connecting the first and second sample delivery lines to the instrument;
at least one cleaning fluid delivery line to supply cleaning fluid to the first sample delivery line and the second sample delivery line;
at least one sample input channel fluidically coupled to the first sample delivery line or to the second sample delivery line by the position switching valve, wherein the at least one sample input channel comprises a robotic sampler positioning device that comprises at least one arm; and
a wash liquid selection valve for delivering cleaning fluid to the first and second sample delivery lines, so that sample and cleaning fluid alternately flow through the first and second sample delivery lines.
2. The apparatus of claim 1 , wherein the position switching valve comprises a four-way two-position switching valve.
3. The apparatus of claim 1 , wherein the position switching valve switches between a first mode and a second mode.
4. The apparatus of claim 3 , wherein the first mode of the position switching valve fluidically couples the first sample delivery line to the instrument and fluidically couples the second sample delivery line to the sample input channel.
5. The apparatus of claim 3 , wherein the second mode of the position switching valve fluidically couples the first sample delivery line to the sample input channel and fluidically couples the second sample delivery line to the instrument.
6. The apparatus of claim 1 , wherein the sample loading and injection branches of the first and second sample delivery lines comprise symmetrical sample loading and injection branches.
7. The apparatus of claim 1 , wherein said at least one arm comprises a reagent transfer pump.
8. The apparatus of claim 7 , wherein the reagent transfer pump comprises a syringe pump, a peristaltic pump, or a diaphragm pump.
9. The apparatus of claim 1 , wherein the apparatus further comprises an instrument fluidically coupled to the fluid flow management mechanism by an interface channel.
10. The apparatus of claim 9 , wherein the instrument comprises a flow cytometer.