Bioreactor for quantification of headspace VOC content from cultures
A bioreactor for sampling the headspace above cells includes a glass reactor vessel having an interior space and a plurality of valves operatively coupled to the interior space of the glass reactor vessel. The bioreactor includes a sample holder configured to reside in the interior space. The interior space includes a charge of air with a known composition of volatile organic gases and, in some instances, doped with carbon dioxide. The sample holder may hold cells, bacteria, or viruses. The headspace may be sampled after incubation to determine the VOC content or content of specific VOC constituents. Examples include acetaldehyde and hexanaldehyde.
1. A bioreactor system comprising:
a glass reactor vessel comprising a first glass half comprising an interior volume and a first valve communicating with the interior volume of the first glass half, a second glass half comprising an interior volume and a seal interposed between the first glass half and the second glass half;
a sample holder configured to reside in the interior volume;
a pump system coupled to a source of charge gas having a known composition of volatile organic gases;
a conduit connecting the pump system to the glass reactor vessel, the conduit comprising a non-volatile organic gas emitting material, wherein the first valve is interposed between the conduit and the glass reactor vessel; and
a sample container coupled to the conduit, wherein a second valve is interposed between the sample container and the glass reactor vessel.
2. The bioreactor system of claim 1 , further comprising a clamp configured to urge the first glass half and the second glass half toward one another.
3. The bioreactor system of claim 2 , wherein the first and second valves comprises stopcocks.
4. The bioreactor system of claim 1 , further comprising a manifold operatively coupled to at least one of the first and second valves.
5. The bioreactor system of claim 4 , wherein the pump system is operatively coupled to the manifold.
6. The bioreactor system of claim 1 , wherein the sample holder comprises a glass or polytetrafluoroethylene vial.
7. The bioreactor system of claim 1 , wherein the source of charge gas comprises artificial air.
8. The bioreactor system of claim 1 , further comprising a gas chromatography system.