TGA Interface
The SSI-16 Interphase is an automatic multi sample loop Storage Sample Interphase for coupling a TGA to a GC/MSD from any vendor. During the thermal degradation of material, the composition of the evolved gas varies too fast for the GC or GC-MSD device to follow properly the char, max temp. 375°C. With the SSI-16 the GC analysis duration is not anymore a limitation for the TGA profile studies. The SSI-16 system collects samples from TGA during the thermal transition according a user-defined sequence. Samples are consecutively stored in the loops(x 16). Once finished the collection process, the SSI-16 does a self-cleaning of the lines before starting the GC analysis sequence, Where all loops will be injected one after the other in a complete automated process. The SSI-16 interphase is controlled by software that allows setting the storage loop timetable according the TGA profile.
Principle of operation
The SSI-16 is composed by:
- two heated transfer line in Sulfinert® (for TGA and GC sample collection / delivery), max temp. 375°C
- two six port heated valve and a heated 16-loop valve, , max temp. 375°C
The carrier gas from the GC pass through the injection valve which is activated to direct the carrier flow to the sample loop and the GC transfer line during the sample injection.
Evolved gases are collected in the loops following the desired time table. The isolation valve allows a precise sample collection during a specific time of the thermal evolution
LabDAQPro Software
The ISS-16 is provided with its own software package.
It’s possible to: edit sequences, save methods and the software is managing automatically the GC start via the remote port of the GC. Connection between ISS & Software is made over USB connection in the PC.
With Agilent Openlab Software (Chemstation or EzChromand also Masshunter), the LabDAQpro software can automatically start the runs.
The simple user-interphase allows to program the collection time schedule for all the loops independently.
Times are editable in seconds.
Options allows to program:
- Automatic GC runs after ending the sample loop collection
- Automatic loops wash sequence after GC injections
- Fast injection direct mode when using a single loop combined with a fast analyzer or real time MS analyzer.
An atmospheric pressure equilibrium before injection for the loops improve the repeatability of the gas injected in the GC
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Number of loop |
16 in Sulfinert TM material |
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Loop volume |
Customized volumes on request, 250µL standard |
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Number of valves |
3 (injection, storage, isolation) Automatic & manual management |
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Heated zones |
3 electronically regulated |
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Heated transfer line |
1 meter x 1/16” in SulfinertTM material; T.Max 375°C |
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Heated valve box temperature |
310°C maximum standard version |
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Power |
220 VAC – 1000W max. |
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Dimensions |
It requires 40 cm (W) of space. |
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Software requirements |
Windows 7, Ethernet port |
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GC requirements |
Require a split/splitless inlet, remote start-in, remote ready-out PC |
