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Micellar Extraction Preconcentration and Colorimetric Determination of Some Phenols
Journal of Analytical Chemistry ( IF 1.0 ) Pub Date : 2020-06-30 , DOI: 10.1134/s1061934820060076 S. Yu. Doronin , E. S. Zhestovskaya , E. I. Tsyguleva
中文翻译:
胶束萃取预浓缩和比色法测定某些酚
更新日期:2020-06-30
Journal of Analytical Chemistry ( IF 1.0 ) Pub Date : 2020-06-30 , DOI: 10.1134/s1061934820060076 S. Yu. Doronin , E. S. Zhestovskaya , E. I. Tsyguleva
Abstract
We studied the extraction and preconcentration of phenol and its hydroxy derivatives using individual and mixed micelles of nonionic and cationic surfactants with the digital recording of the analytical signal. This approach is based on the color reaction of phenols with diazotized 4-nitroaniline and micellar extraction of the products of their interaction (azo compound). The micellar extraction parameters (pH, the concentration of reagents, NaOH, and ethanol) were optimized for the efficient extraction of azo compounds of the studied phenols. The proposed method enables the determination of phenol and resorcinol at the MPC level with an error not exceeding 10%. For a qualitative assessment of the presence of phenols, the geometric parameters (area S, perimeter P) of the corresponding radar plots were used along with colorimetric parameters (R, G, B). The calibration dependences are linear within 1 × 10–7–3 × 10–5 M for phenol and 1 × 10–7–2 × 10–5 M for resorcinol and phloroglucinol. The developed colorimetric method was tested in the determination of resorcinol in the Rezortsinol pharmaceutical preparation.中文翻译:
胶束萃取预浓缩和比色法测定某些酚