Utilization of FTIR Spectroscopic Method in Classification and Analysis of Mineral Samples Containing Sodium and Potassium
Abstract
Feldspar is used as an important raw material in the ceramic, porcelain, and glass industries and as a
filling material in the welding electrode, rubber, plastic, and paint industries. The ratio of Na2O
(originated from Na-feldspar) and K2O (originated from K-feldspar) in feldspar plays a decisive role in
many issues, from melting points to usage areas. However, since Na-feldspar and K-feldspar have
similar physicochemical properties, it is difficult to separate and analyze them from their natural
mineral environment by traditional methods. For this reason, it has become necessary to choose a
method that can be applied without separating feldspar species from each other and without damaging
the sample. The ATR-FTIR method was preferred because of its ease of sample preparation,
measurement without damaging the sample, and providing information about the functional groups
and other components in the sample. In this study, using ATR-FTIR (attenuated total reflectance-
fourier transform infrared) spectroscopy and multivariate statistical techniques, the percentages of
Na2O and K2O in feldspar samples were analyzed in a natural matrix environment without any
pretreatment, and Na-feldspar and K-feldspar samples were grouped.
Keywords
ATR-FTIR spectroscopy, multivariate analysis, chemometry, feldspar
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