Technical data

162 Understanding Your Agilent ChemStation

8 Automation

What is a Sequence/Sequence Template?

A sequence is a series of instructions that automates the analysis of samples.

A sequence can be used to automatically inject each sample, and to acquire

and analyze the data according to the method specified for that sample. Each

sample vial in a sequence may be analyzed with a different analytical method

and, thus, use different sets of chromatographic/electropherographic

conditions and evaluation parameters.

ChemStation introduces two data storage modes, to allow you to choose the

data storage model that matches your workflow. These modes have influence

of the sequence usage:

• Unique Folder Creation ON

• Unique Folder Creation OFF

Unique Folder Creation ON for consistency of sample data uses sequences as

“sequence templates” that can be used to run the acquisition multiple times;

however, they are not used for reprocessing in Method and Run Control. When

the sequence template is run, a sequence data container is created, containing

all related files. If the sequence template is reused, a new sequence data

container is created for each reuse

Unique Folder Creation OFF stores all data in one directory. The sequence *.s

files are not used as sequence templates, so re-executing a sequence again

might overwrite present data, if the data directory is not changed from the

user.

The available sequence/sequence templates (*.s) are visible in the

ChemStation Explorer. For quick and easy navigation, you can add additional

sequence/sequence template locations to the ChemStation Explorer selection

tree using the Paths tab of the Preferences dialog box.