FTIR

Inside the interferometer of Fourier Transform Infrared (FTIR) instrument, a beam splitter split the beam into two. Next, _____

• One of the beam will go to a fixed mirror and another one to a movable mirror which then reflected back and recombined at the beam splitter. 

• One of the beam will go to a fixed mirror and another one to a movable mirror which then be absorbed and detected

• One of the beam will go to a rotating mirror and another one to a movable mirror which then reflected back and recombined at the beam splitter. 

• One of the beam will go to a rotating mirror and another one to a movable mirror which then be absorbed and detected

Bolometer is a

• thermal detector in UV-vis

• pyroelectric detector in UV-Vis

• pyroelectric detector in FTIR

• thermal detector in FTIR

You want to estimate the number of compounds from a sample that has thermally labile compounds. Which instrument is the best choice?

• Gas chromatography

• UV-vis spectrometry

• High performance liquid chromatography

• FTIR spectroscopy

Which is the fingerprint region in FTIR spectrum?

• 500-1500cm-1

• 1000-1500cm-1

• 500-2000cm-1

• 1500-3500 cm-1

Disruptive interference means

• waves in phase

• waves in partial phase

• waves completely out of phase

• none of the above

The FTIR detectors can be classified into three categories,

• thermal detectors, pyroelectric detectors and waves detectors.

• thermal detectors, waves detectors and photoconducting detectors.

• thermal detectors, pyroelectric detectors and photoconducting detectors.

• thermal detectors, pyroelectric detectors and electron detectors.

Nama I and II

• I: interferometer

  II: Moving Mirror

• I: Beam Splitter

  II: Moving Mirror

• I: Moving mirror

  II: Interferometer

• I: Moving Mirror

  II: Beam Splitter

Incandescent lamp

• -Used in all IR region.

• -Used in far IR region.

• -Used in mid IR region.

• -Used in near IR region.