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Annals of Chemical Science Research

Analysis and Identification of two Soaps by Infrared Absorption Spectra and Reflectance Graphs

Submission: December 02, 2019Published: December 09, 2019

ISSN : 2688-8394
Volume1 Issue4

DOI: 10.31031/ACSR.2019.01.000523


Two soap bars one green and another white green were analyzed, and their total fatty matter content, unsaponifiable, un-saponified and un-saponified saponifiable matter content, ethanol-insoluble matter, and free caustic alkali content were determined. The infrared spectra of total lipids, unsaponifiable fats, and insoluble matter in ethanol, were recorded for the two soaps. The Kubelka-Munk K/S values were calculated using the expression depended on reflectivity R͚ of the observed soap’s surface, as well as the CIE L*a*b* values for both soaps.

Keywords: Soap; Total fatty matter content; FT IR spectra; Kubelka-Munk expression; Color in the CIE L*a*b* system

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