Instrumental Analysis Exam 1 questions with
verified answers
absolute error Ans✓✓✓ = abs(true value - measured value) (accuracy)
accuracy Ans✓✓✓ how close a measured analytical result is to the true
answer.
Analyte Ans✓✓✓ substance to be measured
Apperance of water in IR Ans✓✓✓ Symmetric stretching at 4000 cm-1
and scissoring from 2000-1300 cm-1.
Atomic Spectra Ans✓✓✓ little to no noise. simple and basic. nothing in
terms of levels
Beer's Law Ans✓✓✓ Absorbance = Adsoptivity * path length *
concentration (additive).
Bending Ans✓✓✓ Change in bond angle. Scissoring, Wagging, Rocking,
and Twisting.
Bolometer Ans✓✓✓ Measure temperature as a function of a change in
resistance between two materials.
, Chemical Noise Ans✓✓✓ noise caused by chemical interactions
(humidty and chemical fumes)
determinate error Ans✓✓✓ cahttp://quizlet.com/9756801/edit/n be
determined and corrected (human error, instrumental error)
determinate error Ans✓✓✓ how far from the correct answer (human,
instrument, method error).
Diffraction Ans✓✓✓ beam of radiaiton is bent as it passes a "sharp"
barrier or "narrow" opening.
Diffraction Grating Ans✓✓✓ Parallel lines that diffracts the light. High
order diffraction has different wavelengths at same angle so more
filters needed.
Dipole Moment Ans✓✓✓ Polar molecules that produce ir activity
Double-Beam UV-VIS Ans✓✓✓ Sample and Blank at same time.
Problem with alignment of mirrors to the detector.
Environmental Noise Ans✓✓✓ Noise from the outside world power
lines, radio waves, power fluctuations.
verified answers
absolute error Ans✓✓✓ = abs(true value - measured value) (accuracy)
accuracy Ans✓✓✓ how close a measured analytical result is to the true
answer.
Analyte Ans✓✓✓ substance to be measured
Apperance of water in IR Ans✓✓✓ Symmetric stretching at 4000 cm-1
and scissoring from 2000-1300 cm-1.
Atomic Spectra Ans✓✓✓ little to no noise. simple and basic. nothing in
terms of levels
Beer's Law Ans✓✓✓ Absorbance = Adsoptivity * path length *
concentration (additive).
Bending Ans✓✓✓ Change in bond angle. Scissoring, Wagging, Rocking,
and Twisting.
Bolometer Ans✓✓✓ Measure temperature as a function of a change in
resistance between two materials.
, Chemical Noise Ans✓✓✓ noise caused by chemical interactions
(humidty and chemical fumes)
determinate error Ans✓✓✓ cahttp://quizlet.com/9756801/edit/n be
determined and corrected (human error, instrumental error)
determinate error Ans✓✓✓ how far from the correct answer (human,
instrument, method error).
Diffraction Ans✓✓✓ beam of radiaiton is bent as it passes a "sharp"
barrier or "narrow" opening.
Diffraction Grating Ans✓✓✓ Parallel lines that diffracts the light. High
order diffraction has different wavelengths at same angle so more
filters needed.
Dipole Moment Ans✓✓✓ Polar molecules that produce ir activity
Double-Beam UV-VIS Ans✓✓✓ Sample and Blank at same time.
Problem with alignment of mirrors to the detector.
Environmental Noise Ans✓✓✓ Noise from the outside world power
lines, radio waves, power fluctuations.
