Supercritical fluid chromatography

Triple point in a phase daigram of the substance indicates

• two phases co-exist

• three phases co-exist

• single phase

For SFC, the mobile phase must exist in this state

• critical

• subcritical

• supercritical

Which is the best mobile phase for SFC

• ethane

• carbon dioxide

• ammonia

• n-hexane

A substance can reach supercritical state by ______temperature beyond crtical pressure

• increasing

• decreasing

• retaining

Supercritical fluids have properties ______gases and liquids.

• inbetween

• same as

• totally different than

Density of supercritical fluids is close to that of a liquid

• True

• False

____is generally added as a moderator in SFC

• Ethane

• carbon dioxide

• n-hexane

• methanol

Which of these components not seen in HPLC

• precolumn

• back pressure regulator

• analytical column

• detector

Viscosity of Super Critical Fluid is close to ___

• gases

• liquids

• solids

In SFC stationary phase is non-polar

• True

• False