Axis BTA 2100D Manual do Operador descarregar pdf (Página 175)

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Ionization Mode - EI Auto

Item Description

Mass Range

Segment Breaks

The EI scan is made up of between 1 and 6 scan

segments, each holding a contiguous mass-range

segment. Overall, the set covers the entire mass range of

10 to 650 m/z. Only the intermediate segment boundaries

can be changed by the user.

Ionization Storage

Level

The rf voltage used during the ionization period. Values

from 5 to 150 m/z.

Ionization Time

Factor

The Ionization Time Factor, given as a percent, is a

number that is multiplied by the calculated ionization time

(determined by the AGC pre-scan pulse) to give the actual

ionization time. Values from 1 to 999%.

Target TIC Value

Target TIC value determines how many ions AGC allows

into the ion trap during the calculated ionization time.

Range of values is 10 to 65000.

Maximum

Ionization Time

Sets the limit for the longest ionization time which AGC can

use. Values from 10 to 65000 sec.

Prescan

Ionization Time

This ionization time determines the number of ions formed

for the prescan. This value is then used to calculate the

ionization time for the analytical scan. Range 10 to 2500

usec.

Background Mass

The lowest mass used to determine the target TIC (total

ion current) value; all ions of lower mass are ejected from

the ion trap before the AGC prescan pulse. The

background mass can be set to any value from 10 m/z to

300 m/z; it is typically set to 45 m/z.

rf Dump Value

This value specifies the high m/z used for the prescan. It

should always be as high or higher than the analytical scan

range high mass.

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Axis BTA 2100D Manual do Operador Página 175

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