Discussion
Why does bleed matter particularly with a mass spectrometer?
Answer: C
Siloxane fragments from a bleeding column appear as persistent background ions and gradually coat the source, reducing sensitivity. There is no flame, electrons are not absorbed appreciably, and a capillary's flow is well within pumping capacity. Low-bleed columns exist specifically for this pairing, which is a good example of one component being redesigned because of what it does to another. Reading the definition literally, rather than recalling a formula, is the reliable route through questions of this shape.
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