Spectra workspace

FTIR viewer
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Multi-select supported. Each column will match the file name.

Chart settings

View and processing

Chart settings

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Peaks / stripes

No spectrum selected
Peak search
Signal
Baseline raw mode
Detection parameters
Not run.
Peak table actions

Click the chart to place a marker, then add it here.

  Wavenumber Label Tip  
No stripes yet. Set a marker and add it here.
Spectrum settings

Spectrum
Peak search

Peak detector guide

These settings affect how automatic peaks are selected for the active spectrum.

Signal type

Transmittance (%T) is converted to absorbance, so absorption bands are detected as peaks. For absorbance or intensity, the values are used directly.

Baseline method

Removes slow background curvature before peak search. arPLS is the default. For very broad bands, compare the corrected curve and try Linear or None if the band is being removed.

Prominence

Minimum contrast against the local baseline. Increase it to remove noise and weak shoulders; decrease it to find weaker bands.

Distance

Minimum separation between peaks in cm⁻¹. Increase it when one broad band is split into many nearby peaks.

Smooth

Moving-average window in data points. Increase it for noisy spectra, but a large value can flatten narrow peaks. Use an odd number.

Quick start: try Prominence 0.02, Distance 8, Smooth 5, then adjust one setting at a time.
Peak processing

Baseline correction

Choose how the slow background is removed from the active spectrum. Apply the correction before searching peaks.

The main chart will switch to the corrected curve in the original display scale. Peak search will use the same applied correction.

The red line is the baseline used by the fine detector. The green curve is searched for peaks. The broad-pass detector keeps broad bands separately.
Local profile

Application settings

Settings are stored only in this browser. Do not import an untrusted settings file.

Mode
Service connections
LLM preferences

A personal AI key is sent only to a server with BYOK explicitly enabled. It is never included in logs.

Access tokens

Reference token is SERVICE_TOKEN from the reference-service .env. The analysis token is needed only if your own analysis API requires Bearer authentication. Reference service repository · Analysis server repository