SK-Ana User’s Manual

(2020-09-11)

Introduction

The SK-Ana graphical interface is organized in sequential order of project management:

• Project: define a project’s name and load the data

• Data Selection: define the data subset to be treated

• SVD: perform Singular Values Decomposition analysis

• ALS: perform Alternated Least-Squares decomposition

• Kinet: constrain the analysis by a kinetic model

• Downloads: download saved the results and/or a report

• About: information about the code

A good introduction to the methods can be found in the article

C. Ruckebusch, M. Sliwa, P. Pernot, A. de Juan and R. Tauler (2012) “Comprehensive data analysis of femtosecond transient absorption spectra: A review”. J. Photochem. Photobiol. C 13:1–27. (http://dx.doi.org/10.1016/j.jphotochemrev.2011.10.002)

Workflow

A typical workflow consists in the sequence:

`Project` > (`Data Selection` > `SVD` > `ALS`) > `Downloads`

where the sequence between parentheses is iterated until satisfecit. Technically, the SVD step could be avoided for an ALS analysis, but it provides a lot of useful information and should not be overlooked.

To perform a SAS or DAS analysis, the sequence would be

`Project` > `Data Selection` > `SVD` > `Kinet` > `Downloads`

here again, the SVD step helps to decide the number of species to include in the chemical scheme.