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PSMB > SPECTROPHOTOMETRY > Flashcards

SPECTROPHOTOMETRY Flashcards

1
Q

Defined as method of analysis which deals with the measurement of spectra

A

SPECTROMETRY

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2
Q

Range of colors, energy, and activity of a drug

A

SPECTRA

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3
Q

A branch of spectrometry which embraces the measurement of
the absorption by chemical species of radiant energy of definite
and narrow wavelength approximating monochromatic radiation

A

SPECTROPHOTOMETRY

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4
Q

Complete cycle which pass a given point per second

A

FREQUENCY

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5
Q

Number of waves per cm

A

WAVELENGTH

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6
Q

Fxnal grp which absorbs radiant energy in uv/vis region (ethylene, methylene, aldehyde, and ketone)

A

CHROMOPHORE

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7
Q

The ratio of the radiant power transmitted by the soln to the radiant power transmitted by the blank

A

TRANSMITTANCE

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8
Q

Also called optical density, absorbancy, extinction coefficient

A

ABSORBANCE

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9
Q

Expressed in grams of solute per liter of soln

A

CONCENTRATION

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10
Q

The value obtained by dividing the absorbance by the product of conc (in g/L)

A

ABSORPTIVITY

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11
Q

The value obtained by dividing the absorbance by the product of conc (in moles/L)

A

MOLAR ABSORPTIVITY

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12
Q

The complete system of energy propagated in wave form

A

ELECTROMAGNETIC SPECTRUM

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13
Q

Refers to the energy in UV, Vis, and IR regions of the EM spectrum

A

RADIANT ENERGY

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14
Q

The graph plotting absorbance versus wavelength

A

ABSORPTION SPECTRUM

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15
Q

WAVELENGTH—
UV
VISIBLE
NEAR IR

A

UV=220-380nm
VISIBLE=380-780nm
NEAR IR=780-3000nm

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16
Q

WAVELENGTH—
Medium
Grp Freq Region
Fingerprint Region
Far IR

A

Medium=3.0-15um
Grp Freq Region=3-8um
Fingerprint Region=8-15um
Far IR=15-300um

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17
Q

Radiation of single wavelength

A

MONOCHROMATIC RADIATION

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18
Q

Usual spectral region that approximates monochromatic radiation

A

0.5-10nm

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19
Q

States that the power of a transmitted radiant decreases exponentially as the concentration of the solution containing the
absorbing chemical species increases arithmetically

A

BEER’S LAW

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20
Q

States that the power of a transmitted radiant beam decreases exponentially as the thickness (turbidity or cloudy) of the solution
containing the absorbing chemical species increases arithmetically

A

LAMBERT OR BOUGUER’S LAW

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21
Q

A combination of the above law and relates the power of the
incident and the transmitted radiant beam to the thickness and concentration of the solution containing absorbing chemical species

A

BEER-LAMBERT OR BEER-BOUGER’S LAW

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22
Q
  • Associated with the overall motion of electrons around the nuclei
A

Electronic (UV)

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23
Q
  • Associated with the motion of atoms within the molecule
A

VIBRATIONAL (IR)

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24
Q

Associated with the overall rotation of the molecule

A

Rotational
(Microwave)

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25
Q

Not quantized
- Associated with the motion

A

Transitional

26
Q

Causes the excitation of the vibrations of covalent bonds within that molecules

A

IR Radiation

27
Q

distance between two atoms increases or decreases

A

STRETCHING

28
Q

Position of the atom changes relative to the original bond axis

A

BENDING (DEFORMATION)

29
Q

Bending
In-Plane =

A

Scissoring & Rocking

30
Q

Bending
Out-of-Plane =

A

Wagging & Twisting

31
Q

standard method for determining the physicochemical properties of drug molecules prior to formulation

A

UV Spectroscopy

32
Q

Rotation of spinning nucleus when magnetic field is applied (MRI)

A

NUCLEAR MAGENTIC RESONANCE

33
Q

An instrumental method for identifying the chemical constitution
of a substance by means of the separation of gaseous ions according to their differing mass and charge

A

MASS SPECTROMETRY

34
Q

based on the measurement of intensity of the light emitted when a metal is intro into a flame

A

FLAME SPECTROSCOPY

35
Q

Is an analytical technique involves the study of the absorption of radiation by neutral atoms in gaseous state

A

ATOMIC ABSORPTION SPECTROSCOPY

36
Q

Measures excess energy by emission/fluorescence

A

FLUOROMETRY

37
Q

Measurement of the brightness of transmitted light

A

TURBIDIMETRY

38
Q

Measurement of the brightness of reflected light

A

NEPHELOMETRY

39
Q

Absorption measurement that is made in visible spectrum

A

COLORIMETRY

40
Q

Info about the analyte is derived from the measurement of current

A

VOLATAMMETRY

41
Q

Method of analysis based on the measurement of current resulting from the electrolysis of an electroactive species at a given electrode potential under controlled conditions

A

POLAROGRAPHY

42
Q

-Study and measurement of electrode potentials

A

POTENTIOMETRY

43
Q

electrodes for pH determination

A

GLASS ELECTRODES

44
Q

Develops a potential that varies according to the activity (conc) of hydrogen ions of the spec comp in the soln

A

INDICATING ELECTRODES

45
Q

maintains a constant potential

A

REFERENCE ELECTRODES

46
Q

Used to determine quantitatively the strength & purity of soln

A

REFRACTOMETRY

47
Q

Ratio of the velocity of light in air to the velocity of light in medium

A

INDEX OF REFRACTION

48
Q

max value of refraction

A

CRITICAL ANGLE

49
Q

Establish sample’s purity and identity

A

POLARIMETRY

50
Q

Is a property of substance to rotate a plane of polarized light

A

POLARIMETRY

51
Q

Used to obtain plane-polarize light

52
Q

Polarized the light

53
Q

Examined the light

54
Q

Overall difference in the position of the analyzer provide minimum light intensity

A

ROTARY POWER

55
Q

Monochromatic Light Source (Instrument)

A

Sodium Vapor Lamp

56
Q

Polarizer (Instrument)

A

Calcite Prism

57
Q

2 Prisms used

A

Iceland spar
Nicol prism

58
Q

small tube of circular or square cross section, sealed at one end, made of plastic, glass or fused quarts (UV lights) designed to hold a sample

59
Q

Null-balance manually operated instrument

A

BECKMAN DU-2 SPECTROPHOTOMETER

60
Q

DIRECT-READING MANUALLY OPERATED SPECTROPHOTOMETER

A

BAUSCH AND LOMB SPECTRONIC 20

PSMB (20 decks)

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