Formative Quiz PG413-PHG401

Gas chromatography is a technique used for separation of........................

• Non-volatile

• Volatile

• substance that can be made volatile

• B & C

............. is used as a mobile phase in gas chromatography

• Methanol

• Helium

• Hexane

• Ethanol

Carrier gas should be of low density

• True

• False

Gas chromatography can be used for................ analysis

• both qualitative and quantitative

• Qualitative only

• Quantitative only

Stationary phase in GLC is ................

• Solid

• Liquid

• Liquid supported on solid

• Gas

The higher the flow rate, the less interaction with stationary phase, and the shorter the retention time which leads to poorer separation

• TRUE

• FALSE

GSC is used for separation of volatile species

• TRUE

• FALSE

Electron capture detector can be used for ..................

• halides and nitriles

• most organic compounds

• universal

• sulphur and phosphorus

In thermal conductivity detector, the sample is destroyed

• TRUE

• FALSE

................. detector requires a radioactive source

• Thermal conductivity

• Flame ionization

• Photo-ionization

• Electron capture