Discussion
Where does atomic absorption still hold an advantage?
Answer: C
For a laboratory determining two or three metals routinely, an absorption instrument is a fraction of the cost and far simpler to run. Simultaneous multi-element work belongs to the plasma, non-metals are outside both techniques' usual reach, and solids need dissolution for either. A technique displaced from the general case can remain the right answer in the specific one, and cost is usually why. Checking the units of each quantity catches a wrong formula before the arithmetic begins.
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