Determination of cadmium at ultra-trace levels by CPE–molecular fluorescence combined methodology

Talio, María Carolina; Luconi, Marta Olga; Masi, A.; Fernández, Liliana Patricia

doi:10.1016/j.jhazmat.2009.04.101

Cited by 26 publications

(16 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous studies have shown that this dye presents the feasibility of forming association with metallic ions [25,29,30]. In preliminary assays, aqueous systems containing eo and Zn (II) were prepared adjusting a pH from 6.0 to 10.0.…”

Section: Study Of Zn (Ii)-eo System: Support and Surfactant Selectionmentioning

confidence: 99%

“…The use of micellar media has been investigated in order to improve analytical parameters of instrumental methodologies such as sensitivity and selectivity [21][22][23][24][25]. Particularly, micellar enhanced separation method have been extensively studied for removal of heavy metals and organic pollutants by using ultrafiltration membranes [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Surfactant Enhanced Chemofiltration of Zinc Traces Previous to Their Determination by Solid Surphase Fluorescence

Vega¹,

Augusto²,

Talio³

et al. 2011

AJAC

Self Cite

View full text Add to dashboard Cite

Surfactant enhanced chemofiltration on Nylon membranes pre-treated with hexadecyltrimethylammonium bromide (HTAB) and eosin dye (eo) is proposed for zinc traces quantification by solid surphase spectrofluorimetry (SSF, λ exc = 532 nm; λ em = 548 nm). Operational variables which have influence on quantitative retention of metal complex have been studied and optimized. At optimal experimental conditions, quantitative recovery was reached with a detection limit of 0.662 pg·L -1 and quantification limit of 2.20 pg·L -1 . The calibration sensitivity was of 1.22 L·pg -1 for the new methodology with a linear range of 2.20 pg·L -1 to 779 pg·L -1 Zn (II). The tolerance levels of potential interfering ions were studied with good results. Recuperation studies were carried out by standard addition method applied to natural water samples (San Juan, Argentine) without previous treatment. The reproducibility (between-days precision) was also evaluated over 3 days by performing five determinations each day. CV% was 0.37. The performing obtained in sensitivity and selectivity thanks to chemofiltration step, converts the proposed methodology in an adequate alternative to conventional techniques for Zn (II) traces determination.

show abstract

Section: Study Of Zn (Ii)-eo System: Support and Surfactant Selectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surfactant Enhanced Chemofiltration of Zinc Traces Previous to Their Determination by Solid Surphase Fluorescence

Vega¹,

Augusto²,

Talio³

et al. 2011

AJAC

Self Cite

View full text Add to dashboard Cite

show abstract

“…These enhanced luminescence techniques have been developed for the detection of different categories of contaminants such as organic compounds, pesticides, metals and non‐metals. Table summarizes the enhancement effect of micelles in the luminescence detection of pollutants in water samples , canned beverages , soil , tomato and peppers , sewage , vegetables and fruits , potato pollutants and metals in aqueous samples over the last decade.…”

Section: Introductionmentioning

confidence: 99%

Applications of micelle enhancement in luminescence‐based analysis

Alarfaj

El‐Tohamy

2014

Luminescence

View full text Add to dashboard Cite

Micelles are self-assembled aggregates that arrange themselves into spheres in aqueous media. When the surfactant concentration reaches the critical micelle concentration, extensive aggregation of the surfactant monomers occurs to form micelles. A micelle has both a hydrophilic and a hydrophobic part. This allows them to form a spherical shape and for their glycolipid and phospholipid components to form lipid bilayers. The importance of micelles is increasing because of their wide analytical applications. Recently, colloidal carrier systems have received much attention in the field of analytical chemistry, especially in luminescence enhancement applications.

show abstract

“…The application of molecular fluorescence in cadmium traces determination has put in evidence analytical advantages such as high sensitivity, proper selectivity and wide dynamic range when it is associate to separation/ preconcentration step [13,14].…”

Section: Introductionmentioning

confidence: 99%

Direct Cadmium Monitoring in Cigarette Filters Leachate by Molecular Fluorescence

Talio¹,

Bonfiglioli²,

Luconi³

et al. 2012

JEP

Self Cite

View full text Add to dashboard Cite

This work proposes a new direct flourimetric methodology for cadmium traces quantification based on its association with azo-reagent SPADNS and rhodamine B dye. Experimental variables that influence on fluorimetric sensibility were optimized using uni-variation assays. The calibration graph using zeroth order calibration was linear from 0.192 to 1.26 104 µg.L^-1, with a correlation coefficient of 0.99. Under the optimal conditions, it was obtained a limit of detection of 0.057 µg.L^-1 and a limit of quantification of 0.192 µg.L^-1. The method showed good sensitivity, adequate selectivity with good tolerance to foreign ions, and was applied to the determination of trace amounts of cadmium in filters leachates coming from unsmoked, automatically smoked and smokers smoked cigarettes with satisfactory results. The proposed method represents an innovative application of luminescence to metal analysis comparable in sensitivity and accuracy to atomic spectroscopies

show abstract

Determination of cadmium at ultra-trace levels by CPE–molecular fluorescence combined methodology

Cited by 26 publications

References 37 publications

Surfactant Enhanced Chemofiltration of Zinc Traces Previous to Their Determination by Solid Surphase Fluorescence

Surfactant Enhanced Chemofiltration of Zinc Traces Previous to Their Determination by Solid Surphase Fluorescence

Applications of micelle enhancement in luminescence‐based analysis

Direct Cadmium Monitoring in Cigarette Filters Leachate by Molecular Fluorescence

Contact Info

Product

Resources

About