Fluorescence method using on-line sodium cholate coacervate surfactant mediated extraction for the flow injections analysis of Rhodamine B

Acosta, Gimena; Talio, María Carolina; Luconi, Marta Olga; Hinze, Willie L.; Fernández, Liliana Patricia

doi:10.1016/j.talanta.2014.06.014

Cited by 16 publications

(7 citation statements)

References 37 publications

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“…Many of the published methods consume large amounts of organic solvents and require complex procedures (such as nitrogen stripping and purification before extraction) or the need to spend much more time and intensive labor on the preparation of synthesizing materials as the absorbents for the SPE column [17][18][19][20][21][22]. In contrast, no such tedious steps are required in the proposed methodology.…”

Section: Comparison With Existing Methodsmentioning

confidence: 99%

Preparation of a concentric layered structure of an electrospun nanofiber column for solid-phase extraction of mass viscous crude extracts

et al. 2016

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The packed nanofiber solid-phase extraction of crude extracts of a mass viscous sample is challenging because the interference and recalcitrant particulates in the sample may attach to the nanofiber and block the column, which leads to insufficient sample extraction. A novel concentric layered nanofiber solid-phase extraction (SPE) column using polystyrene-based electrospun nanofiber as the stationary phase has been employed for the pretreatment of mass viscous crude extracts. The layered column was fabricated by using untouched nanofiber with its natural morphology rather than hand-packing of spoiled fiber to the control packing density of the column. In the novel column, the SPE packed bed was divided into a multi-layer structure to provide uniform radial and axial packing and to part the mobile phase stream by the isolated layer with great superiority in aspects such as lower column pressure and faster elution speed. The feasibility and efficiency of the LFSPE column were then evaluated via determination of rhodamine B (RB) from spiked chili samples. Based on the LFSPE column, a linear spiked calibration curve in the range of 0.02-5 mg/kg was obtained. The limit of detection (LOD) and limit of quantification (LOQ) of the method were 0.001 and 0.004 mg/kg, respectively; recoveries at 0.1, 1, and 2 mg/kg (n = 3) were all up to 95 %; and the RSD values of inter-day and intra-day were all below 5 %. This novel LFSPE column overcame heterogeneous packing and exploited the wall effect in subtle ways, and exhibited great superiority by comparison with some existing methods. Graphical Abstract ᅟ.

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Section: Comparison With Existing Methodsmentioning

confidence: 99%

Preparation of a concentric layered structure of an electrospun nanofiber column for solid-phase extraction of mass viscous crude extracts

et al. 2016

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“…The FIA scheme used in previous reported works [27] was used here aiming to produce the highest peak area and adequate peak shape.…”

Section: 5general Proceduresmentioning

confidence: 99%

Novel spectrofluorimetric method for boldine alkaloid determination in herbal drugs and phytopharmaceuticals

Peralta

Henestrosa

Gil

et al. 2017

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…In this way, micellar media have shown to be effective to minimize intermolecular interactions between the analyte and sample matrix constituents. Additionally, the photophysical properties of the fluorescent solutes can be altered in the micellar medium improving the fluorescent sensitivity[28].Like traditional surfactant micelles, bile salt (BS) micelles present unique properties that can be used in chemical analysis and separation science applications; between others the ability to solubilize selectively solutes, alter the rate and equilibrium of chemical processes, modify the effective microenvironment such as polarity, viscosity and surface tension of bound solutes[29].…”

mentioning

confidence: 99%

New Analytical Methodology for Sb(III) Traces Quantification as Emergent Contaminant in Drinks Packaged PET Samples by Solid Surface Fluorescence

Talio¹,

Feresin²,

Muñoz³

et al. 2019

AJAC

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Emerging contaminants constitute a set of substances that are released into the environment for which regulations are currently not established for their environmental monitoring, being antimony one of them. A new methodology for Sb(III) traces monitoring by solid surface fluorescence is proposed. The metal was complexed with alizarine (Az) as fluorosphore reagent in alcaline medium in presence of the bile salt sodium cholate. To isolate the analyte of matrix constituents, a preconcentration/separation strategy on filter paper was introduced prior to determination step. The solid surface fluorescence was measured λ em = 450 nm and λ exc = 363 nm using a solid sampler holder. Under optimal conditions, the limits of detection and quantification of proposed methodology were 0.08 and 0.24 µg•L −1 , respectively, showing a linear range from 0.24 to 304.4 µg•L −1 with good sensitivity and adequate selectivity. It was applied to the Sb(III) traces determination present in drinking water and beverages samples packaged in polyethylene terephthalate (PET) bottles widely consumed in Argentina. The combination of a preconcentration step on common filter paper and the inherent sensitivity of photoluminescent methods have permitted to achieve sensitivity similar to atomic spectroscopies using a lower price instrument typical in control laboratories. Precision and accuracy were tested with excellent agreement. Results were truenessed by ETAAS with satisfactory concordance.

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Fluorescence method using on-line sodium cholate coacervate surfactant mediated extraction for the flow injections analysis of Rhodamine B

Cited by 16 publications

References 37 publications

Preparation of a concentric layered structure of an electrospun nanofiber column for solid-phase extraction of mass viscous crude extracts

Preparation of a concentric layered structure of an electrospun nanofiber column for solid-phase extraction of mass viscous crude extracts

Novel spectrofluorimetric method for boldine alkaloid determination in herbal drugs and phytopharmaceuticals

New Analytical Methodology for Sb(III) Traces Quantification as Emergent Contaminant in Drinks Packaged PET Samples by Solid Surface Fluorescence

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