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ChromeGate 3.3.2 Software Manual - KNAUER Advanced Scientific ...

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264 SEC Option<br />

Fig. 373<br />

SEC peak and after the last SEC peak you wish to enter in your<br />

SEC setup peak list.<br />

Once you have clicked to define the peak region, a box will appear where<br />

you select options for the defined peaks.<br />

Add<br />

Choose this option to add the selected peaks to the current SEC<br />

calibration peak table. Existing peaks in the table will be maintained.<br />

Replace<br />

Choose this option to selectively replace peaks in the current SEC<br />

calibration table. The tolerance is used to determine if an existing time<br />

should be replaced with a new time. If the tolerance is 0 the numbers<br />

must be an exact match. The larger the tolerance percentage is the<br />

larger the variance can be between the new value and the existing value<br />

and still be considered a match.<br />

Average<br />

Choose this option to selectively average new times in the current SEC<br />

calibration table with existing ones. The tolerance is used to determine if<br />

an existing time should be average with the new time. If the tolerance is<br />

0 the numbers must be an exact match. The larger the tolerance<br />

percentage is the larger the variance can be between the new value and<br />

the existing value and still be considered a match. Only five trial values<br />

will be used in the average. If you try to average a sixth time value, the<br />

oldest trial time will be thrown out.<br />

Tolerance<br />

Tolerance % is used to determine “matching” values when using the<br />

replace or average options. If the tolerance is 0 the numbers must be an<br />

exact match. The larger the tolerance percentage is the larger the<br />

variance can be between the new value and the existing value and still be<br />

considered a match.<br />

Click OK to enter the defined peaks into the SEC Setup table.<br />

Annotating SEC Chromatograms<br />

When you view an SEC chromatogram in the chromatogram window,<br />

there are a number of annotation options available to you that are specific<br />

to SEC samples. These are available for you to set when you do a righthand<br />

mouse click in the chromatogram window, and select Annotations.

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