Spectroscopic Methods Flashcards

Analytical Chemistry Part 2

1
Q

Used for identification myriad inorganic and organic species

A

UV-Vis

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2
Q

What is the application of UV-Vis

A

Organic Compounds, chromophoes, inorganic compound, charge transfer complexes

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3
Q

What are unshared outer electrons that are largely localized?

A

O, X, S and N

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4
Q

Radiation source, monochromator, shutter, reference cell, detector, amplifier, readout

A
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5
Q

Measurement of wavelength and intensity of the absorption of mid-infrared light by a sample

A

IR spectroscopy

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6
Q

Molecule must undergo a change in dipole moment

A

True

To absorb infrared radiation

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7
Q

IR source, beam splitter, chopper (wavelength selctor), monochromator, IR detector

A

Double Beam IR Spectroscopy Setup

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8
Q

IR Source

Nernst Glower

A

Rare earth oxides, fragile, must preheated to be conductive

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9
Q

IR Source

Rod of silicon carbide, at short wavelengths

A

Globar Source

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10
Q

IR Source

Carbon dioxide laser

A

Used for monitoring certain atmospheric pollutants

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11
Q

Thermal Detectors

A

Thermocouple and Bolometer

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12
Q

Most expensive

A

Photoconducting detectors

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13
Q

Insulator with special thermal and electric properties

A

Pyroelectric detectors

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14
Q

Neat means

A

Solvent

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15
Q
A

Nujol mull

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16
Q
A

KBr press

17
Q

What is the function of IR Spectroscopy?

A

To elucidate functional groups or structure based on the distinct reigion in IR spectra

18
Q

Measurement of the wavelenngth and intensity of the absorption of near-infrared light

A

NIR Spectroscopy

19
Q

Light source

A

W lamp

20
Q

Detector

A

Pb-S solid state

21
Q

Sample

A

Glass or quartz

22
Q

Can detect atoms with nuclear spin of 1/2

A

Nuclear Magnetic Resonance (NMR) Spectroscopy

Behaves like a magnet

23
Q

A computational method for analyzing the frequencies present in an oscillating signal

A

Fourier Transform

24
Q

Radio frequecy is transformed into _____?

A

NMR Spectrum

Through FR

25
Q

Excitation of the inner electrons of atoms promotes some to higher energies.

A

Xray Emission Spectroscopy

26
Q

Subjected elements by Xray Emission Spectroscopy

A

Elements heavier than Flourine

27
Q

XFR Instrumentation

Device producing a parallel beam of rays

A

Collimators

28
Q

Either measures yha angle or allows roation to a precise angular position

A

Goniometer Scale

29
Q

Mass Spectrometer

The higher the signal,

A

The higher the abundance

30
Q

True or False?

No other elements are absorm in the same wavelength

A

True

31
Q

ICP

A

Inductive Coupled Plasma