Combi Flash 7650 Series Manual de usuario descargar pdf (Pagina 101)

Section 4 User Help Reference

4-21

Note: If both Slope and Threshold peak detection

methods are checked, PeakTrak considers a peak to

be present when any one condition is met. This logical

OR operator means that PeakTrak will cut a peak

when either the Slope condition is true, or when the

Threshold condition is true.

• All Wavelength Detection — Enable this option to

detect peaks within a user-selected range of

wavelengths. When enabled, click the Details button to

configure additional settings. These settings include the

slope-based and peak width options described in 1 and

2 above. Additionally, you can type or select the

minimum and maximum wavelengths limits in

nanometers.

• External Detector — Enable this option to use a 0 to 1

volt analog signal from an external detector. When

enabled, click the Details button to configure additional

settings. These settings include the slope-based and

peak width options described in 1 and 2 above.

PeakTrak will use its internal algorithms to detect and

cut peaks based on the analog input signal. Refer to the

External Detector instruction sheet for electrical and

plumbing requirements.

• Show Ratio — If using two of the above peak detection

options, check this option to display a ratio of the

selected wavelengths. The ratio trace is often a useful

indicator of purity. Refer to the M

ONITORING THE

AVELENGTH RATIO [4.4.7] topic for more details on this

feature.

4.3.3 Gradient Optimizer

Use this window to automatically generate a gradient curve

from the results of two TLC plates. Follow the on-screen

instructions, then enter valid TLC data in the Gradient

Optimizer window. Click the OK button and the Method

Editor window will display the new gradient curve.

When using the Gradient Optimizer, PeakTrak may insert an

isocratic hold into the generated gradient. Furthermore,

PeakTrak may automatically extend the isocratic hold during

the run to increase peak resolution.

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Combi Flash 7650 Series Manual de usuario Pagina 101