Metrohm 792 Basic IC Instrukcja Użytkownika Pobierz pdf (Strona 105)

4 Operation

792 Basic IC

External standard calibration

External standard calibration (absolute calibration) is a key way of cali-

bration. Basically this procedure calculates the dependence of injected

component's quantity versus area (or height) of the corresponding

peak. This dependence is showed as a calibration plot with injected

quantity along the Y axis and peak area (or height) along the X axis. The

injected quantity

is calculated as product of component's concentra-

tion

to the reduced injected sample volume

= C

•

The calibration function

(R)

for each component is calculated using

the RSD method.

(R) = RSD(Q

, R

) = RSD((C

•

V'), R

)

When quantification procedure is performed, a concentration

(abso-

lute concentration of a component in the sample) is determined as a ra-

tio of the computed quantity

)

to the corrected volume of sample

injected

= W

) / V'

Component table

792 BASIC IC / Method / Calibration / Components

If the component table is opened, the chromatogram window is split

into two parts. The upper one shows the chromatogram, the compo-

nent table appears in the bottom part of the screen. When moving into

the component table, a special cursor in the upper part of the window

jumps to the peak corresponding to the current component.

The

Components table

stores the following information on the compo-

nents to be analyzed:

1 2 ... 100 101 102 103 104 105 106 107 108 109 110 ... 196 197

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