Where do you go when
your peak fitting software won't fit the peaks?
To Razor FIT. Here's why:
|Use analytical or Captured Data Peaks. Why limit yourself to
Gaussians if your peaks really aren't Gaussian?|
|Use a captured peak shape, or mix with analytical peak shapes, to
tame the most complicated chromatographic spectrum.|
|Exclusive Peak Property Linking permits two or more peaks to have
fixed separations and/or fixed height ratios, and/or linked width
relationships. Every constraint that you can impose will reduce the
uncertainty of the fit, so why not use everything you know? It's the
Overlapping peaks? Razor's PIC integrates with FIT to find even the most badly
occluded peaks, and feeds them to FIT. All you have to do is veto the choices
don't like. No fiddling.
Ugly peak shapes? Choose an actual shape from your data. FIT will adjust the
width, height, and symmetry to fit those peaks. Chromatographers note: no
analytical guessing required.
Too many peaks? Takes too long? Use FIT's new Bunch processing. You can fit
85 peaks in 1 minute. Is that fast enough? Just the thing for x-ray diffraction
Special restrictions? You know that two or more peaks MUST be
by a certain interval, or MUST have particular amplitude ratios, or MUST have certain
width relationships? Tell Razor. It will give you a Maximum Likelihood fit with
just the constraints you spell out.
Superior engine. Doesn't choke on large numbers of peaks. If GRAMS Peak
(Curvefit) doesn't converge, do
this: Save your Peak Fitting setup in a parameter file
(*.crv file). Run FIT and load the peak parameter (*.crv) file you saved. Get
Spectral Factor Files. Simple peak shapes are not adequate for your fit? Would you
like to use measured spectra as a components of the fit? You may specify spectral
files to use as components (factors) in fitting your sample spectrum. CRV accepts
up to 10 Spectral Factor
Files for use by FIT.
Peak fitting for multifiles too!
Linked Peak Parameters. Link peaks to assure that two peaks maintain a known
separation, or a particular amplitude or width
ratio. Heck, link all peaks together if
needed! Links are achieved via Master/Slave setup in CRV.
Bunch Mode, for faster processing. In bunch mode, FIT will sort your peaks into
'bunches', and process each bunch
separately. Useful for problems with large numbers
of peaks, where the peaks in one bunch do not merge with peaks in another bunch.
Has been used successfully on X-ray data containing 75 peaks.
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