Discussion
What is discrimination in an injector?
Answer: B
If the needle and liner do not vaporise every component equally, the less volatile ones are under-represented on the column and the composition reported is wrong. Detector response, irreversible retention and split variability are separate problems. Because discrimination distorts a quantitative result without distorting the chromatogram's appearance, it is detected only by comparing against a standard of known composition. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision.
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