Abstract

The spectral subtraction technique was applied to solid samples of HCOONa and CH₃COONa along with small amounts of D-variants. The weak signals due to the D-species heavily overlapped by strong absorption bands from the H-species were separately observed by removing the interfering absorbances of the H-substances from the composite spectra of the isotopic mixtures. The best result was achieved when the homogeneity of the sample thickness and composition was satisfactory.

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