Question

Among the given options, select the parts which are present in UV visible spectrophotometer.
A. Interferometer
B. Monochromator
C. Hollow cathode lamp
D. Deuterium lamp

• A. B and D only
• B. A and B only
• C. B and C only
• D. A and D only

Hint:

Associate components with instruments:

\textbf{UV-Vis}: Deuterium/Tungsten Lamp + Monochromator
\textbf{AAS}: Hollow Cathode Lamp
\textbf{FTIR}: Interferometer

Answer 1

The Correct Option is A

Let's pinpoint the vital parts of a UV-Visible Spectrophotometer.
Phase 1: Component Examination. A UV-Vis spectrophotometer necessitates:

A light source spanning UV and visible spectra.
A mechanism for isolating a specific light wavelength.
A sample container.
A detector.

Phase 2: Option Assessment.
A. Interferometer: This is fundamental to an FTIR (Fourier Transform Infrared) spectrometer, not a UV-Vis instrument.
B. Monochromator: This component (employing a prism or diffraction grating) selects a narrow wavelength band from the light source, crucial for a UV-Vis spectrophotometer.
C. Hollow cathode lamp: This is a specialized light source used in Atomic Absorption Spectroscopy (AAS), not UV-Vis.
D. Deuterium lamp: This standard light source generates ultraviolet (UV) radiation (typically 190-400 nm) in a UV-Vis spectrophotometer (a tungsten lamp is used for the visible range).
Conclusion: The Monochromator (B) and the Deuterium lamp (D) are both essential UV-Vis spectrophotometer components.