Fluidic network for aseptic sampling
Described are a fluidic network and a method for aseptic process sampling. The fluidic network includes a sampling valve, filter, manifold and valve control module. A process sample path in the fluidic network includes one or more valve channels and a filter in fluidic communication with the sampling valve. The sampling valve is configurable in a first valve state to receive a process sample into the process sample path from a process source and configurable in a second valve state in which gas and solvent flows may be provided through the process sample path to clean and dry the process sample path to prepare for acquisition of another process sample.
1 . A fluidic network for aseptic process sampling, comprising:
a sampling valve having a plurality of ports and a plurality of valve channels and being configurable in at least a first valve state and a second valve state, wherein one of the ports is a process inlet port configured to receive a process sample, another one of the ports is a process outlet port configured to dispense the process sample;
a filter in fluidic communication with the sampling valve;
a manifold configured to supply and control the flows of a plurality of fluids, the manifold having a manifold outlet port to provide a flow of a selected one of the fluids, the manifold outlet port being in fluidic communication with one of the ports of the sampling valve; and
a valve control module in communication with the sampling valve and the manifold,
wherein, a process sample path is defined between the process inlet port and the process outlet port and includes the filter and at least one of the valve channels,
wherein, when the sampling valve is in the first valve state, the process sample path is enabled to receive the process sample,
wherein, when the sampling valve is in the second state, the flow of the selected one of the fluids from the manifold outlet ports is enabled to pass through the process sample path, and
wherein, when the sampling valve is in the second state, the process inlet port is isolated from all of the other plurality of ports of the sampling valve.
2 . The fluidic network of claim 1 wherein the manifold is controllable to provide a selected one of a solvent flow and a gas flow to the process sample path.
3 . The fluidic network of claim 1 wherein the manifold comprises a manifold valve having a first inlet port configured to receive a gas flow and a second inlet port configured to receive a first solvent flow and wherein the manifold valve is configurable in a first valve state in which the gas flow is conducted from the first inlet port to the manifold outlet port, a second valve state in which the first solvent flow is conducted from the second inlet port to the manifold outlet port, and a closed valve state in which the first and second inlet ports are fluidically decoupled from the manifold outlet port.
4 . The fluidic network of claim 2 wherein, when the sampling valve is in the second valve state and the manifold provides the gas flow, the gas flow is conducted through the process sample path and wherein, when the sampling valve is in the second valve state and the manifold provides the solvent flow, the solvent flow is conducted through the process sample path.
5 . The fluidic network of claim 4 wherein the gas and solvent flows are in a reverse direction relative to a flow of the process sample through the process sample path.
6 . The fluidic network of claim 2 wherein the valve control module is configured to adjust a period during which at least one of the gas flow and the solvent flow passes through the process sample path.
7 . The fluidic network of claim 1 wherein the sampling valve is a rotary shear seal valve.
8 . The fluidic network of claim 1 wherein the sampling valve is a linear shear seal valve.
9 . The fluidic network of claim 1 wherein the filter is formed of a porous material.
10 . A method for aseptic process sampling, the method comprising:
providing a fluidic network for aseptic process sampling including:
a sampling valve having a plurality of ports and a plurality of valve channels and being configurable in at least a first valve state and a second valve state, wherein one of the ports is a process inlet port configured to receive a process sample, another one of the ports is a process outlet port configured to dispense the process sample;
a filter in fluidic communication with the sampling valve;
a manifold configured to supply and control the flows of a plurality of fluids, the manifold having a manifold outlet port to provide a flow of a selected one of the fluids, the manifold outlet port being in fluidic communication with one of the ports of the sampling valve; and
a valve control module in communication with the sampling valve and the manifold,
wherein, a process sample path is defined between the process inlet port and the process outlet port and includes the filter and at least one of the valve channels, wherein, when the sampling valve is in the first valve state, the process sample path is enabled to receive the process sample and wherein, when the sampling valve is in the second state, the flow of the selected one of the fluids from the manifold outlet ports is enabled to pass through the process sample path;
providing a flow of the process sample through the process inlet port of the sampling valve and through the process sample path in the fluidic network;
providing a first gas flow through the process sample path after the flow of the process sample;
providing a first solvent flow through the process sample path after the first gas flow;
providing a second gas flow through the process sample path after the first solvent flow; and
isolating the process inlet port of the sampling valve during the providing the first gas flow, the first solvent flow and the second gas flow.
11 . The method of claim 10 further comprising providing a second solvent flow through the process sample path after the second gas flow.
12 . The method of claim 11 wherein the second solvent flow comprises one of a flow of a phosphate-buffered saline and a cell culture medium solution.
13 . The method of claim 11 further comprising providing a third gas flow through the process sample path after the second solvent flow.
14 . The method of claim 10 further comprising providing a second solvent flow through the process sample path after the first solvent flow and before the second gas flow.
15 . The method of claim 10 wherein a duration of each of the first and second gas flows and the first solvent flow through the process sample path are predetermined.