A mathematical model between the relative error in the Kubelka-Munk (K-M) function and the sample concentration has been determined if the K-M function is linear with the sample concentration, c≤ w/w%. The theoretical model has been investigated by measuring 3-5 parallels at different sample concentrations and calculating the RSD for the selected absorption bands. Quartz (dave = 1.3 μm) and calcite (dave = 3.3 μm) as analytes and KBr (dave = 9.9 μm) as embedding material were used. The result of the model and the experiments were in a good agreement. It has been shown that the RSD for absorption bands with small sensitivity can increase up to ±20-60%. The precision of the quantitative analysis in diffuse reflectance infrared Fourier transform spectrometry (DRIFTS) can be improved by applying more sensitive absorption bands and parallel measurements at one standard concentration.
|Number of pages||6|
|Journal||Spectrochimica Acta Part A: Molecular Spectroscopy|
|Publication status||Published - Nov 1994|
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