Peak® Partial Least Squares (PLS)
PLS is a very versatile technique used for liquid, solid and vapor phase samples, in both transmission and reflectance measurements. Peak® Spectroscopy Software's implemention of PLS is robust and field-tested. It is used world-wide in critical enviromental, forensic, industrial and military applications.
An advantage of PLS is that the method does not have to know about all possible constituents in a mixture. The standards used in the model need to incorporate the range of possible samples found in the field, but does not require spectra of pure compounds, as needed in CLS. Another advantage is that the full spectrum can often be used, it is not always necessary to indentify analysis regions for each compound in the PLS model.
Peak's PLS is designed to make method development less tedious and error-prone with advanced file handling and data entry features. This, along with advanced diagnostics to ensure correct and robust modeling, make Peak PLS the industry's leading PLS application.
The PLS documentation can be viewed by clicking the 'Help' button on the PLS Method tab in Peak.
The PLS documentation can be downloaded in .pdf form here: peakPLS.pdf
Tutorial PLS Method
The PLS manual references a tutorial method, which can be downloaded here: setup_peak_pls_tutorial.pdf
PLS COM Server
A COM server for PLS analysis is available for use in long-running custom analysis applications. The COM server and html documentation can be downloaded here: setup_peak_pls_com_v3.exe