A trace constituent is one whose amount in the sample is
Correct answer: D. < 0.01%
- A. < 10%
- B. < 20%
- C. < 1.0%
- D. < 0.01%
Explanation
A trace constituent is a component that is present in a very small or minute amount. The conventional definition for a trace amount is a concentration of less than 100 parts per million (ppm), which is equivalent to less than 0.01%.
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Analytical chemistry identifies and measures substances using separation and instrumental methods. Chromatography is studied through stationary and mobile phases, retention and Rf values, while spectroscopy connects absorption of electromagnetic radiation with molecular structure and supports qualitative and quantitative analysis through techniques such as UV-visible and infrared spectroscopy.
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