Use of dinitrophenols in ion-pair extraction spectrophotometry of cationic tensides
Kubícek, V.
Ceska a Slovenska Farmacie Casopis Ceske Farmaceuticke Spolecnosti a Slovenske Farmaceuticke Spolecnosti 54(2): 82-85
2005
ISSN/ISBN: 1210-7816 PMID: 15895971 Document Number: 590314
The application of 2,4-dinitrophenol and 2,6-dinitrophenol as reagents for a ion pair extraction spectrophotometry was tested. The ion pair extraction spectrophotometry experiments were carried out using a simplified procedure (test tube method). Four cationic tensides were used as model analytes. After the optimal conditions of the assay were being determined, the influence of the concentration excess of the reagents on the absorbance of the chloroform extract was investigated. Calibration curves were constructed; an estimation of limits of quantitation was performed and apparent molar absorption coefficients were determined. The obtained results show that both investigated dinitrophenols are suitable for the studied purpose.