Dispersive liquid–liquid microextraction–spectrophotometry combination for determination of rhodamine B in food, water, and environmental samples

Abstract

A new dispersive liquid-liquid microextraction procedure combined with UV-visible spectrophotometry is described for sensitive and selective determination of rhodamine B. Various analytical parameters such as pH, extraction and dispersive solvents type and volume, sample volumes, and extraction time were optimized. Matrix effects of concomitants were also examined. Preconcentration factor was found to be 330. Detection limit was calculated as 2.1 μg L −1 . The relative standard deviation was found to be 4%. The validation of the developed procedure was checked by the addition/recovery tests. The procedure was successfully performed to the determination of trace levels of rhodamine B in drug, ink, food, cosmetic product, and waste waters.

Surface Polymers on Multiwalled Carbon Nanotubes for Selective Extraction and Electrochemical Determination of Rhodamine B in Food Samples

“…Various preconcentration methods were also applied, such as cloud point extraction (CPE) [ 10 ], solid phase extraction (SPE) [ 11 ], and liquid-liquid extraction (LLE) [ 12 ]. The magnetic solid phase extraction (MSPE) technique provides various advantages as a sample preparation and preconcentration alternative: mainly, time preservation, high preconcentration factor, and adsorbent reusability [ 13 ].…”

Design of GO–Ag-functionalized Fe3O4@CS composite for magnetic adsorption of rhodamine B

“…7 Because of its hazardous nature and harmful effects, the development of a simple method for the determination of RB in different samples is necessary. Various techniques have been developed for the determination of RB to date, including ultraviolet spectrophotometry, [8][9][10] capillary chromatography, 11,12 high performance liquid chromatography, 13,14 uorescence spectrophotometry. 15,16 Due to the complexity of sample matrices and lower concentration of RB in lots of real samples, it is meaningful to develop an effective separation and enrichment technique to determine RB accurately.…”

Efficient adsorption of erythrosine and sunset yellow onto modified palladium nanoparticles with a 2-diamine compound: Application of multivariate technique

“…Industrial wastewater of dyes can lead to serious environmental and health problems due to their high toxicity, chemical stability, slow degradation, and potential carcinogenicity [1][2][3]. Among these contaminations, sunset yellow is one of azo dyes that are added to a wide range of industrial products consist of beverage, jams, jelly, soup and sauces [4,5].…”