Help

HOW TO USE OUR SERVICE

Pre-processing spectra

To pre-process spectra, use the "Spectra Visualizer" page. Page view with processed spectrum:

To select spectrum(s) for preprocessing, use the list of available spectra (1). The list (1) has a search function. After selecting the spectrum(s) for preprocessing, select the sequence of actions using the constructor (2). The constructor window view:

In the "Choose method" list, select the desired processing method. The "Add" button adds the method to the preprocessing sequence described in the "Methods string". When the processing sequence is formed, click the "Send" button to transfer it to the main program. The "Close" button closes the constructor window without transferring the preprocessing sequence.

Alternatively, if you have been using our service for a long time and remember the preprocessing encoding or preprocessing sequences saved in text format, you can enter them directly into the "Input processing chain" text field (4) without using the constructor.

Preprocessing is implemented by pressing the "Process" button. The result of the sequence execution is displayed in the image (8). The primary spectrum is displayed in the image (7).

Alternatively, if you have been using our service for a long time and remember the preprocessing coding or preprocessing sequences saved in text format, you can enter them directly into the "Input processing chain" text field (4) without using the constructor.

The implementation of preprocessing is carried out by pressing the "Process" button. The result of the sequence execution is displayed in the image (8). The primary spectrum is displayed in the image (7).

The data shown in figures (7) and (8) can be saved in the *.csv table format. To do this, use the "Download CSV" button (5).

If you use the Baseline Correction function (code - baselineals), the appearance of the baseline, which is subtracted from the spectrum(s), can be activated/deactivated with the "Show baseline" switch (6).

About

Alpinus Chemia created and maintains this service with the aim of providing researchers and chemometrics enthusiasts with access to tools that allow pre-processing of spectra and their comparison by various methods, searching for similarities in custom databases. We also provide users with the ability to create, save, and use PLS regression models. These services are based on the company's experience in processing different spectra, primarily NIR spectra, obtained by various devices, including those equipped with MEMS sensors.

Our goal is not only to provide access to convenient online tools, but also to implement algorithms for comparing spectra obtained by different NIR spectrometers.

Our website: https://alpinuschemia.com/

Spectra Visualizer

Download CSV
* — Info about mean center

Spectra Compare



PLSR

Select spectrum and data


Methods:
Result:

PLSR DA

Select spectrum and data


Methods:
Result:

My models

My Spectra

Admin panel

Not found

© Alpinus Chemia 2025