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What is a disadvantage of using gas chromatography

A)It is expensive to perform.


B)It takes a day or more to obtain results.
C)It requires a large quantity of the substance.
D) It doesn't provide the exact chemical composition.

User Mapcuk
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c.it requires a large quantity of substance
User Kishen
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This can lead to many answers, but typically I'd think it's D
User Bhunesh  Satpada
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