SPECTROCHEMICAL METHODS

Question 1

Measurements based on light and other forms of electromagnetic radiation

Answer 1

Spectrochemical methods

Question 2

Any analytical method that uses light for measurement of chemical concentrations

Answer 2

Spectrophotometry/spectroscopy

Question 3

Dispersion of light travels through a triangular prism

Answer 3

Spectroscopy

Question 4

Can be thought as a wave or particle

Answer 4

Light

Question 5

Is the distance between crests of a wave

Answer 5

Wavelength

Question 6

Is the number of oscillations per second

Answer 6

Frequency

Question 7

an empirical relationship that relates the absorption of light to the properties of the material through which the light is travelling

Answer 7

Beer-lambert’s law

Question 8

law states that there is a logarithmic dependence between the transmission (or transmissivity), T, of light through a substance and the product of the absorption coefficient of the substance, α, and the distance the light travels through the material

Answer 8

Beer-lambert’s law

Question 9

Plastic ware wherein we will put a sample and light passes through it

Answer 9

Cuvette

Question 10

law states that there is a logarithmic dependence between the transmission (or transmissivity), T, of light through a substance and the product of the absorption coefficient of the substance, α, and the distance the light travels through the material

Answer 10

Beer-lambert’s law

Question 11

fraction of incident light at a specified wavelength that passes through a sample.

Answer 11

Transmittance

Question 12

unitless measure of the transmittance of an optical element for a given length at a given wavelength

Answer 12

Optical density

Question 13

involves interactions of matter with electromagnetic radiation, such as light.

Answer 13

Electromagnetic spectroscopy

Question 14

Electromagnetic specstroscopy can be classified as:

Answer 14

Emission spectroscopy
Absorption spectroscopy
Scattering spectroscopy

Question 15

the study of electromagnetic radiation spectra given off by atoms or molecules that undergo a transition to a lower energy level.

Answer 15

Emission spectroscopy

Question 16

the study of electromagnetic radiation spectra absorbed by atoms or molecules that change energy levels; the atoms usually positioned between a radiation source and the observer

Answer 16

Absorption spectroscopy

Question 17

uses the range of the electromagnetic spectra in which a substance absorbs

Answer 17

Absorption spectroscopy

Question 18

can be used to determine the concentration of chemical compounds in samples

Answer 18

Absorption spectroscopy

Question 19

absorption of infrared radiation,

Answer 19

Vibrational spectroscopy

Question 20

is a technique for determining the concentration of a particular metal element in a sample

Answer 20

Atomic spectroscopy

Question 21

absorption of infrared radiation

Answer 21

Vibrational spectroscopy

Question 22

deals with visible light and shorter wavelengths, since fluorescence is less likely to happen with long wavelengths.

Answer 22

Emission spectroscopy

Question 23

absorption of ultraviolet and visible light

Answer 23

UV/Visible spectroscopy

Question 24

Measures the absorption of gamma rays by atoms bound in a solid as a function of gamma-ray energy. This is not an analytical technique; it is a means to understand certain microscopic processes in matter

Answer 24

Mossbaeur spectroscopy

Question 25

As the quantity of energy (the power) put into the flame is known, and the quantity remaining at the other side (at the detector) can be measured, it is possible, from Beer-Lambert law, to calculate how many of these transitions took place, and thus get a signal that is proportional to the concentration of the element being measure

Answer 25

Atomic absorption spectroscopy

Question 26

is the subset of spectroscopy that deals with the infrared region of the electromagnetic spectrum

Answer 26

Infrared spectroscopy

Question 27

widely used in both research and industry as a simple and reliable technique for measurement, quality control and dynamic measurement.

Answer 27

Infrared spectroscopy

Question 28

As the quantity of energy (the power) put into the flame is known, and the quantity remaining at the other side (at the detector) can be measured, it is possible, from Beer-Lambert law, to calculate how many of these transitions took place, and thus get a signal that is proportional to the concentration of the element being measure

Answer 28

Atomic absorption spectroscopy

Question 29

is the subset of spectroscopy that deals with the infrared region of the electromagnetic spectrum

Answer 29

Infrared spectroscopy

Question 30

It is of special use in forensic analysis in both criminal and civil cases, enabling identification of polymer degradation for example.

Answer 30

Infrared spectroscopy

Question 31

Most widely used method of spectroscopy

Answer 31

Infrared spectroscopy