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I suspect you will need really inexpensive gas chromatographs to make it widespread. These are really neat tools, and I wish their acquisition and maintenance was more in reach (a used Agilent is $3K USD and goes up rapidly from there, with a more common low-end price in the $5-7K USD range).

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A used HP 5890 might be 3k usd but realistically you are looking at 40k for a refurbished unit. That's what I paid for mine. You can never turn off a GC without an elaborate shutdown procedure. They consume a lot of power and require AC to be running. You need to keep a low level of gas flowing all the time.

It's about as far from accessible as one can get. I can't even imagine sample prep and...well, it's just not a viable solution. As a manufacturing principle QC should be performed in process and at the least processed state.

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