User`s guide

Accessories
191
Internal Standard Accessory
The Internal Standard (IS) Addition Accessory (P/N M041-3555) is
an 8-port valve equipped with a 0.5-mL sampling loop. The valve is
installed into the flow path as shown in Figure 58 for manual
pneumatics. Figure 59 shows the PPC flow path (with the
TurboMatrix 350 ATD flow chart given as an example of PPC). It is
used to add an aliquot of a known standard onto each tube before
primary desorption.
The Internal Standard option is installed in the factory. If you order
the accessory after your instrument has been delivered, the option
must be installed by a service technician. Please contact PerkinElmer
for further information.
If your ATD/TD is equipped with the Internal Standard Accessory
and a standard injection time different from zero minutes is entered
into the Method, a gaseous internal standard aliquot is added to the
front (sampling end or weak end) of every sample tube prior to
desorption.
Figure 58 Flow Diagram of the TD/ATD with Internal Standard
Accessory for Manual Pneumatics
Valve A
Position A
Valve A
Position B
Position B
2
3
4
1
SV1 ISV2
Desorb Supply
Load Vent
Leak PressureCarrier Pressure
Supply
Standard
W
S
Trap
SV2
Carrier Supply
A
B
Transfer Line
To GC
SV4
Outlet Split
SV5
Inlet Split
SV3
Desorb
Vent
Inlet Split
Tube Condition
Vent
Desorb Flow
Vent
Sample Load
and
Reverse Purge Vent
Outlet Split
Vent
Sample Tube
S
W
Valve D
ISV1
Loop
Vent
2
3
4
5
6
1
Pressure
Regulator
PR