Axis BTA 2100D Manual do Operador descarregar pdf (Página 164)

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Chemical Ionization Using Fixed Parameters

The reaction parameters that are normally set by the Auto Control can also be

set manually. For Chemical Ionization using fixed parameters, the instrument

uses the Ionization Time entered in the method editor. The reaction time that

will be used is determined as follows:

TimeIonizationx

TimeIonizationMaximum

TimeReactionMaximum

=TimeReaction Set

where the maximum reaction and ionization times are entered below the

Ionization Time.

Using Liquid CI Reagents

Introduction

Liquids may be used with the Saturn GC/MS as CI reagents in addition to the

standard CI reagent gases. The liquid is placed in a reservoir and connected in

place of the tank of CI gas. The vapor pressure of the liquid reagent is usually

sufficient to provide a constant, low flow to allow operation in the CI mode.

Hardware

The figure below shows a functional block diagram of the CI plumbing setup for

using liquid reagents.

Liquid

Reservoir

CI Shutoff

Valve

Restrictor

CI Solenoid

To Manifold

CI Needle

Valve

To Roug h ing Pum p

Functional Block Diagram of Liquid CI Plumbing

1 2 ... 159 160 161 162 163 164 165 166 167 168 169 ... 596 597

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