Method of integrity testing of a single-use system
Disclosed is a method of integrity testing of a single-use system for processing a fluidic material. In the inventive method, a single-use system for processing at least one fluidic material is provided. The single-use system has at least one plastic component. A test gas is applied to a lumen of the single-use system. The test gas has one or more of spectral absorption or spectral emission properties in the infrared spectral range distinguishable from ambient air. At least a part of the single-use system is monitored using an infrared camera. A method of processing a fluidic material by using a single-use system and a test system for integrity testing of a single-use system are also disclosed.
1 . A method of integrity testing of a single-use system for processing at least one fluidic material, the method comprising:
i) providing at least one single-use system for processing at least one fluidic material, the single-use system having at least one plastic component;
ii) connecting a lumen of the single-use system to a supply line, wherein the supply line is connected to a valve that is switchable between a test gas supply and a fluidic material supply;
iii) switching the valve to apply only the test gas to the single-use system, wherein the test gas has one or more of spectral absorption or spectral emission properties in the infrared spectral range distinguishable from ambient air;
iv) monitoring at least a part of the single-use system by using an infrared camera;
v) confirming the integrity of the single-use system; and
vi) automatically switching the valve to introduce only the at least one fluidic material through the supply line and into the single-use system.
2 . The method according to claim 1 , wherein the test gas comprises carbon dioxide.
3 . The method according to claim 1 , further comprising using at least one flow controller configured for controlling at least one of a flow velocity of the ambient air, a mass flow rate of the ambient air, and a volume flow rate of the ambient air.
4 . The method according to claim 1 , wherein the at least one plastic component is selected from the group consisting of: at least one connector element at least partially made of plastic; at least one tubing element at least partially made of plastic; at least one bag element at least partially made of plastic; at least one container element at least partially made of plastic; at least one valve element at least partially made of plastic; at least one filter capsule; at least one sampling system comprising at least one bag and/or at least one capsule; and at least one syringe.
5 . The method according to claim 1 , wherein step iii.) comprises providing at least one background element, wherein the at least one part of the single-use system monitored by using the infrared camera is positioned at least partially between the background element and the infrared camera.
6 . The method according to claim 5 , wherein the single-use-system is positioned at a distance L from the at least one background element, wherein 0 m≤L≤0.5 m.
7 . The method according to claim 5 , wherein the background element comprises at least one visually uniform background screen.
8 . The method according to claim 5 , wherein the background element is mechanically connected to the infrared camera.
9 . The method according to claim 5 , wherein the background element is temperature-controlled.
10 . The method according to claim 5 , wherein the background element is at least one of actively heated or actively cooled.
11 . The method according to claim 10 , wherein the background element is at least one of actively heated or actively cooled by at least one of a fluidic tempering element and an electric tempering element.
12 . The method according to claim 11 , wherein any one of the fluidic tempering element and/or the electric tempering element is arranged in meanders within the background element.
13 . The method according to claim 5 , wherein the background element is at least partially made of one or more of a plastic material, a ceramic material, and a metal material.
14 . The method according to claim 5 , wherein the integrity testing is performed at an ambient temperature and the background element is maintained at a background temperature differing from the ambient temperature, wherein the background temperature differs from the ambient temperature by at least 2 K.
15 . The method according to claim 14 , wherein the background temperature is higher than the ambient temperature.
16 . The method according to claim 14 , wherein the ambient temperature is room temperature and wherein the background temperature is 26° C. to 60° C.
17 . The method according to claim 1 , wherein the single-use-system is positioned at a distance d from the infrared camera, wherein 0 m<d≤2 m.
18 . The method according to claim 1 , further comprising returning at least one integrity result that quantifies and/or qualifies the integrity of the single-use system.
19 . The method according to claim 1 , wherein step iii.) comprises visually detecting the egression of test gas from the single-use system.
20 . The method according to claim 19 , wherein the visually detecting the egression comprises detecting at least one of a jet, a stream, a cloud or a mist of the test gas, wherein the method comprises automatically quantifying a leakage of the single-use system by visually evaluating the jet, the stream, the cloud or the mist of the test gas, respectively.
21 . The method according to claim 1 , further comprising using automatic image recognition.
22 . The method according to claim 1 , wherein, in step ii.), the test gas is applied to the lumen of the single-use system at a pressure of 5 mbar to 300 mbar.
23 . The method according to claim 1 , wherein step iii.) comprises scanning the single-use system by sequentially monitoring different parts of the single-use system.
24 . A test system for integrity testing of at least one single-use system for processing at least one fluidic material, the single-use system having at least one plastic component, the test system comprising:
a) at least one test gas supply configured for applying at least one test gas to at least one lumen of the single-use system, wherein the test gas has one or more of spectral absorption or spectral emission properties in the infrared spectral range being distinguishable from ambient air;
b) at least one infrared camera for monitoring at least a part of the single-use system; and
c) a supply line coupled to the single-use system comprising a valve configured to switch between the test gas supply and a fluidic material supply.
25 . The test system according to claim 24 , further comprising:
d) at least one evaluation device for evaluating the integrity of the single-use system, wherein the evaluation device is configured for deriving at least one item of integrity information from at least one image provided by the infrared camera.
26 . The test system according to claim 24 , further comprising:
e) at least one background element, wherein the test system is configured such that at least one part of the single-use system is positionable at least partially between the background element and the infrared camera.