Preparation method for preparing spectrometric determinations of at least one measurand in a target application

A spectrometric measurement method of determining a value of at least one measurand of a medium in a target application, comprising:

• for each measurand performing a preparation method comprising:
• performing reference measurements of the measurand in the target application including determining reference spectra of the medium and associated reference values of the measurand;
• recording reference data including the reference spectra and the associated reference values;
• determining a master spectrum of the reference data;
• generating synthetic spectra, based on the master spectrum, which comprise individual spectra that are each generated for a specific individual value of the measurand, wherein the individual values cover a value range greater than or equal to a value range covered by the reference values, and
• determining and providing one or more pieces of information required to carry out spectrometric determinations of the measurand in the target application that are based on the synthetic spectra,
• wherein the piece(s) of information comprise a property, a wavelength range, and/or a path length range for an optical path length of a spectrometer suitable for carrying out the spectrometric determinations of the measurand in the target application, and/or comprise a calculation rule for a spectrometer that can be used in the target application, with which measured values of the measurand can be determined on the basis of measurement spectra determinable with this spectrometer in the target application;
• based on the piece(s) of information provided by the preparation method(s), performing at least one of selecting a spectrometer suitable to be employed in the target application and/or implementing the calculation rule in a spectrometer suitable to be employed in the target application, and
• with the spectrometer suitable to be employed in the target application, carrying out at least one spectrometric determination of the measurand(s) of the medium in the target application.