Location:

General tab page
Report Variable (Quantification Method)

Type:

Floating point value

Dimension:

Minutes

Value Range:

0.000 ... 9999.999

Default:

Not chosen

Related Parameters:

Retention Time

Delay Time

Window

Description:

The dead time is defined as the time required for the peak maximum of an unretained substance to reach the detector from the point of injection. Thus, the dead time corresponds to the residual time (of all substances) in the mobile phase.

Enter the dead time on the General tab page in the QNT Editor.

Function:

The adjusted retention time of a substance is defined as the time this substance remains in the stationary phase. The sum of the residual times in the mobile and stationary phases is the Retention Time:

tS = t'S + t0

Where:

tS = Retention time of a substance

t'S = Adjusted retention time of a substance

t0 = Dead time

The dead time is required to calculate the Capacity Factors and the Kovats Indexes.