GAS CHROMATOGRAPHY QUIZ

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

it is inert

it has a lower viscosity

all of above

determine the psychological state of the tutor

analyse the column contents ahead of the sample

determine non-volatiles

analyse volatile compounds from solid or liquid samples

All of these

Electron-capture detector

Infra-red detector

Thermal conductivity

Nitrogen

All of these

Helium

Oxygen

The relative separation achieved between two species

The proportional difference in widths of two chromatographic peaks

None of these

The maximum number of different species which a column can separate simultaneously

splitting the sample into smaller portions to inject sequentially

None of these

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

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

the column is cracked and stationary phase leaks out

the column breaks during installation and causes personal injury

traces of the stationary phase are eluted

elution of the analyte is extended over time

Electrical conductivity

Flame ionisation

Infrared spectroscopy

NMR

0.3-0.5mm

0.2-0.3 mm

0.5-1.0 mm

1.0-2.0 mm

None of these

determine the thickness of the stationary phase

estimate the efficiency of a column

measure the distribution of the analyte between mobile and stationary phases