Which of the following technique/method is not related to instrumental analysis?
Correct answer: D. Gravimetric analysis
- A. Optical method
- B. Colorimetry
- C. Polarography
- D. Gravimetric analysis
Explanation
Gravimetric analysis is a classical or "wet chemical" method that relies on the measurement of mass, typically by weighing a precipitate. Instrumental analysis involves the use of a specialized instrument to measure a physical property like light absorption or electrical potential.
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About Analytical Chemistry
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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