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3
OMNICxi Software Operation
Acquire and Analyze Data
136
DXRxi User Guide
Thermo Scientific
Peak Area Ratio Profile Settings
The Peak Area Ratio profile shows the ratio of the corrected areas of two specified peaks for
each sample point in the chemical image. Using the ratio of two peaks lets you look at:
• Changes in sample material (some peaks will increase while others may decrease)
• Changes in two sample components
• Changes in peak area normalized against another peak to make sure physical variations
(focus for example) are not causing variations in measured peak area
• Information about the number of layers present and the quality of the materials in a
layered sample such as graphene
The colors in the chemical image represent the relative ratioed areas of the specified peaks. A
higher intensity value (closer to the top of the profile intensity scale) indicates a larger peak
area ratio.
Figure 80.
Peak area ratio profile settings
Table 28.
Peak height profile settings
Profile Type
Description
Position
Defines the location of the peak of interest. To specify the peak location,
select the
Spectrum tool
,
then click a point of interest in the
chemical image. The spectrum collected at that location is displayed in
the spectral pane. Enter an X-axis location in the
Position
box or drag
the double triangle tool in the spectral pane to mark the peak location.
Tip
To zoom the spectrum, use the mouse to draw a box around the
region, then click inside the box.
Baseline
start/end
Defines baseline values for the specified peak. Enter X-axis locations in
the
Baseline start
and
Baseline end
boxes or drag the two single triangle
tools in the spectral pane (see image above) to mark the baseline points.
Summary of Contents for DXR xi
Page 12: ...1 Introducing the DXRxi Raman Imaging System Trademarks 6 DXRxi User Guide Thermo Scientific...
Page 14: ...2 DXRxi Microscope Operation 8 DXRxi User Guide Thermo Scientific...
Page 64: ...Safety Information 58 DXRxi User Guide Thermo Scientific Microscope Safety Labels or...
Page 65: ...Safety Information Thermo Scientific DXRxi User Guide 59...
Page 66: ...Safety Information 60 DXRxi User Guide Thermo Scientific...
Page 67: ...Safety Information Thermo Scientific DXRxi User Guide 61...
Page 68: ...Safety Information 62 DXRxi User Guide Thermo Scientific...
Page 166: ...3 OMNICxi Software Operation Acquire and Analyze Data 160 DXRxi User Guide Thermo Scientific...