Instrumental analysis Exam 2026
Questions and Answers
spectroscopy - Correct answer-the branch of science concerned with the
investigation and measurement of spectra produced when matter interacts with or
emits electromagnetic radiation.
monochromator - Correct answer--A monochromator is an optical component
which is used to produce a beam of light with a very narrow bandwidth -effectively
light of a single color.
-act as tunable bandpass filters for light.
monochromator grating - Correct answer-they disperse ultraviolet, visible, and
infrared radiation typically using replica gratings, which are manufactured from a
master grating.
UV-VIS spectroscopy - Correct answer-refers to absorption spectroscopy or
reflectance spectroscopy in the ultraviolet-visible spectral region.
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,voltage follower - Correct answer--is a op-amp circuit which has a voltage gain of
1. This means that the op amp does not provide any amplification to the signal.
-is a op-amp circuit which has a voltage gain of 1. This means that the op amp does
not provide any amplification to the signal.
UV-Vis light source - Correct answer-Tungsten (visible), deuterium (UV), Hg
(UV)
UV-Vis dispersion element - Correct answer-prism or diffraction grating
prism - Correct answer--The dispersion occurs because the angle of refraction is
dependent on the refractive index of the prism's material
-Due to the chromatic dispersion of the material, the deflection angle becomes
wavelength-dependent.
phototube - Correct answer-a photodetector based on a small glass tube containing
electrodes where the external photoelectric effect (or photoemissive effect) is
utilized.
photoelectric effect - Correct answer-the emission of electrons or other free carriers
when light shines on a material. Electrons emitted in this manner can be called
photo electrons.
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, photomultiplier tube(PMT) - Correct answer-- useful for light detection of very
weak signals,
-a photoemissive device in which the absorption of a photon results in the
emission of an electron.
-detectors work by amplifying the electrons generated by a photocathode exposed
to a photon flux
neutral density filter - Correct answer--is a filter that reduces or modifies the
intensity of all wavelengths, or colors, of light equally, giving no changes in hue of
color rendition.
-meant to reduce transmission
Deming's Quality Movement - Correct answer-Quality management is focused not
only on product and service quality, but also on the means to achieve it.
SOP - Correct answer-a set of step-by-step instructions compiled by an
organization to help workers carry out complex routine operations. SOPs aim to
achieve efficiency, quality output and uniformity of performance, while reducing
miscommunication and failure to comply with industry regulations.
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Questions and Answers
spectroscopy - Correct answer-the branch of science concerned with the
investigation and measurement of spectra produced when matter interacts with or
emits electromagnetic radiation.
monochromator - Correct answer--A monochromator is an optical component
which is used to produce a beam of light with a very narrow bandwidth -effectively
light of a single color.
-act as tunable bandpass filters for light.
monochromator grating - Correct answer-they disperse ultraviolet, visible, and
infrared radiation typically using replica gratings, which are manufactured from a
master grating.
UV-VIS spectroscopy - Correct answer-refers to absorption spectroscopy or
reflectance spectroscopy in the ultraviolet-visible spectral region.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
,voltage follower - Correct answer--is a op-amp circuit which has a voltage gain of
1. This means that the op amp does not provide any amplification to the signal.
-is a op-amp circuit which has a voltage gain of 1. This means that the op amp does
not provide any amplification to the signal.
UV-Vis light source - Correct answer-Tungsten (visible), deuterium (UV), Hg
(UV)
UV-Vis dispersion element - Correct answer-prism or diffraction grating
prism - Correct answer--The dispersion occurs because the angle of refraction is
dependent on the refractive index of the prism's material
-Due to the chromatic dispersion of the material, the deflection angle becomes
wavelength-dependent.
phototube - Correct answer-a photodetector based on a small glass tube containing
electrodes where the external photoelectric effect (or photoemissive effect) is
utilized.
photoelectric effect - Correct answer-the emission of electrons or other free carriers
when light shines on a material. Electrons emitted in this manner can be called
photo electrons.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
, photomultiplier tube(PMT) - Correct answer-- useful for light detection of very
weak signals,
-a photoemissive device in which the absorption of a photon results in the
emission of an electron.
-detectors work by amplifying the electrons generated by a photocathode exposed
to a photon flux
neutral density filter - Correct answer--is a filter that reduces or modifies the
intensity of all wavelengths, or colors, of light equally, giving no changes in hue of
color rendition.
-meant to reduce transmission
Deming's Quality Movement - Correct answer-Quality management is focused not
only on product and service quality, but also on the means to achieve it.
SOP - Correct answer-a set of step-by-step instructions compiled by an
organization to help workers carry out complex routine operations. SOPs aim to
achieve efficiency, quality output and uniformity of performance, while reducing
miscommunication and failure to comply with industry regulations.
©COPYRIGHT 2025, ALL RIGHTS RESERVED 3
