Detection System of Gas Chromatography

Question 1

Which of the following is not an ideal characteristic of a detector used in gas chromatography?
a) Linear response to the solutes
b) Short response time
c) High reliability
d) Sensitive to the changes in the flow rate of a carrier gas

Answer 1

d) Sensitive to the changes in the flow rate of a carrier gas

Question 2

Which of the following is not a type of detector used in gas chromatography?
a) Argon ionisation detector
b) Thermal conductivity detector
c) UV visible spectrometric detector
d) Electron capture detector

Answer 2

c) UV visible spectrometric detector

Question 3

Which of the following detectors have high sensitivity to all organic compounds?
a) Sulphur chemiluminescense detector
b) Thermionic emission detector
c) Flame ionization detector
d) Argon ionisation detector

Answer 3

c) Flame ionization detector

Question 4

Which of the following is not the advantage of thermal conductivity detector used in gas chromatography?
a) Simple in construction
b) High sensitivity
c) Large linear dynamic range
d) Non-destructive character

Answer 4

b) High sensitivity

Question 5

Which of the following detectors is widely used to detect environmental samples like chlorinated pesticides and polychlorinated biphenyls?
a) Flame ionization detector
b) Thermal conductivity detector
c) Argon ionisation detector
d) Electron capture detector

Answer 5

d) Electron capture detector

Question 6

In which of the following detector is the eluent mixed with hydrogen and burned and then mixed with ozone and its intensity is measured?
a) Sulphur chemiluminescence detector
b) Thermal conductivity detector
c) Flame ionization detector
d) Electron capture detector

Answer 6

a) Sulphur chemiluminescence detector

Question 7

Filter photometer detector is primarily responsive to which of the following compounds/elements?
a) Volatile sulphur or phosphorous compounds
b) Nitrogen
c) Halogen
d) Potassium

Answer 7

a) Volatile sulphur or phosphorous compounds

Question 8

Which of the following detector uses ultraviolet radiation from lamps to produce ionisation of solute molecules?
a) Sulphur chemiluminescense detector
b) Thermal conductivity detector
c) Photo ionization detector
d) Electron capture detector

Answer 8

c) Photo ionization detector

Question 9

Flame ionisation detector is also known as Katharometer.
a) True
b) False

Answer 9

b) False

Question 10

Thermionic emission detector used in gas chromatography is most sensitive to which of the following elements?
a) Nitrogen
b) Phosphorous
c) Halogen
d) Carbon

Answer 10

b) Phosphorous

Question 11

Which of the following detectors has a non-volatile bead of rubidium silicate placed above the flame tip?
a) Argon ionisation detector
b) Thermionic emission detector
c) Flame ionization detector
d) Electron capture detector

Answer 11

b) Thermionic emission detector

Question 12

In which of the following detectors, the carrier gas is excited by a radioactive source and the atoms of carrier gas are excited to a metastable state?
a) Argon ionisation detector
b) Thermionic emission detector
c) Flame ionization detector
d) Electron capture detector

Answer 12

a) Argon ionisation detector

Question 13

Which of the following is not used as a heating element in a Thermal conductivity detector?
a) Platinum
b) Gold
c) Graphite
d) Tungsten wire

Answer 13

c) Graphite

Question 14

Electron capture detector is much less susceptible to contamination when nickel is used instead of tritium.
a) True
b) False

Answer 14

a) True