Abstract
Abstract A simple and reproducible method of recording visible spectra of solutions using photoacoustic spectrometry and carbon black as a thermal detector is introduced. Light intensity is proportionally measured by carbon black detector, a microphone system and a simple cell compartment placed after monochromator for liquid samples. Exact match with the absorption spectra is found with certain standard solutions. Aqueous solutions of Cr(III), KMnO4, disodium fluorescein and chlorpromazine semiquinone cation radicals are tested.
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