Jitian, Simion published the artcile< The spectrophotometric determination of pyrene dyes in pharmaceuticals and cosmetics>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is spectrophotometry pyrene dye pharmaceuticals cosmetics.
The paper introduces a method used for the determination of the component concentrations of a ternary mixture of pyrene dyes. The method uses the zero-order spectra of these dyes in the spectral range 190[÷]500 nm. It is based on a combination of the determinant method (Cramer’s method) with information on the absorption bands of the dyes in the mixture The method is applied using the slope and intercept values from the linear calibration curves of the pyrene dyes standard solutions: HP3S, P3S and P4S, at three different wavelengths: The three wavelengths: 290nm, 367nm and 375nm, were selected by means of the Kaiser method. When there is a spectral region in which only one of the components has absorption, the concentration can be determined independently of the presence of the other two dyes in the ternary mixture The method used to determine the concentrations of the other two dyes was the Cramer method or the bivariate spectral calibration method (BSC) that solves a system of two equations with two unknowns.
Annals of the Faculty of Engineering Hunedoara published new progress about Cosmetics and Personal care products. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics