GAS CHROMATOGRAPHY QUIZ

splitting the sample into smaller portions to inject sequentially

splitting off some of the sample so that it does not enter the column

splitting the sample into smaller portions to inject at the same time through parallel ports

None of these

4

2

(2)0.5

3

square root of the number of theoretical plates in a column

number of theoretical plates in a column

cube root of the number of theoretical plates in a column

square of the number of theoretical plates in a column

All of these

prevent backflush of the injected solution

retain contaminants and prevent them from reaching the column

retain the sample and release it gradually to the column

it doubles up as a party gas for balloons and funny voices

all of above

it is inert

it has a lower viscosity

the sample is homogenously spread along the column

the sample is spread evenly along the column

all of the sample in the injector has been added to the column

the sample is concentrated at the start of the column

Electron-capture detector

Thermal conductivity

All of these

Infra-red detector

None of these

determine the thickness of the stationary phase

measure the distribution of the analyte between mobile and stationary phases

estimate the efficiency of a column

chromatograph

chromatophore

graph

chromatogram

The distribution of an analyte between the stationary and the mobile phase

All of these

The velocity of the mobile phase

The migration rate of an analyte through a column