HTA HT2000H - Appendix A

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11 Appendix A – Glossary

Head Space Technique

Head Space technique is an indirect method to inject components with low boiling points from

liquid or solid samples. The method is based on the analysis of vapours released from a sample

that has been incubated at a constant temperature for a given period of time. Head Space

technique has some advantages compared to other techniques: quick preparation time compared

to analysis time, possibility to analyse samples that cannot be analysed in liquid or in solid state,

less cross contamination problems and higher sensitivity, as this procedure can be considered as a

pre-concentration step before injection.

Sequence

A sequence is an ordered series of sample vials to prepare and inject, including the method

needed to prepare each vial.

Confirmation Mode

Confirmation Mode Technique injects the same sample into two injectors to confirm the analysis.

The GC is started on the first injection.

Touch sensor

It is used by the autosampler to detect when the vial locator has touched a surface (or obstacle).

System integrity test

The System integrity kit is sold as an option (see paragraph 1.7.2 “Options “). The System integrity

test is used to verify the syringe integrity. To enable this function see paragraph 4.2.4.5 “Setup

configuration: Maintenance “.

If this test is enabled, at the beginning of each batch the system performs a check to verify the

syringe integrity through a heuristic procedure. This test is carried out using the system integrity

tool (see Figure 1 and Figure 2 for HT2000H/HT2000HT and Figure 9 for HT2100H).The septum

of this tool should be replaced periodically (see paragraph 3.6.3 “System integrity tool installation”).

This check can verify if it is better to replace the syringe (barrel and plunger). Please note that this

check does not replace the necessary periodic validations you have to program for the instrument

qualification. If the test fails, a warning message appears (see paragraph 8.14 “System integrity

test fail“).

HTA HT2000H - Appendix A - Glossary