Flow injection system for cadmium preconcentration on poly(octadecyl diitaconate) (PDI-18) and atomic absorption spectrometry detection

Peña, Yaneira Petit de; López, Wilmer; Burguera, M.; Burguera, J.L.; López-Carrasquero,; Carrillo, Mirtha

doi:10.1016/s0003-2670(01)00965-5

Cited by 19 publications

(6 citation statements)

References 34 publications

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“…HGs that contain itaconic acid effectively adsorb Pb 2+ , Cd 2+ , Cu 2+ , and Zn 2+ ions . In addition, poly(octadecyl diitaconate) has been used as filler material for preconcentration of cadmium, showing to be a good sorbent material for Cd 2+ . These studies strongly suggest that these materials, especially when they have high contents of IA or itaconate units in the polymeric chain, could be effective HGs to be used for recover metal ions from contaminated waters.…”

Section: Introductionmentioning

confidence: 94%

Use of super absorbent hydrogels derivative from acrylamide with itaconic acid and itaconates to remove metal ions from aqueous solutions

El‐Halah

Machado

González

et al. 2018

J of Applied Polymer Sci

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Poly(acrylamide‐co‐itaconic acid) (AAm/IA) and poly(acrylamide‐co‐monomethoxyethyl itaconate) (AAm/MEI) hydrogels (HGs) synthesized at different molar ratios were used to study the adsorption of some metal ions as Cu2+, Ni2+, Pb2+, Cd2+, and Fe3+ in aqueous solutions at different concentration: 10, 50, 100, 500, and 1000 mg L−1. Statistical analysis was performed and the effect of the metal ion, ion concentration, and hydrogel (HG) composition, on adsorption and adsorption efficiency, was evaluated for both HGs studied (AAm/IA and AAm/MEI) and each factor gave rise to significant differences (P ≤ 0.05). The adsorption depends on the type of ion, its concentration, and also influenced by the type and composition of the HGs. For each system the adsorption efficiencies for all ions were similar with exception of Fe3+, which showed the highest adsorption efficiency in AAm/MEI HG, but the less for the AAm/IA. For both systems, the maximum adsorption efficiency was observed when the molar ratio AAm/IA or AAm/MEI is 80/20. When the adsorption was carried out with individual ions, AAm/MEI HG was more efficient than AAm/IA. For a multielement sample of Cu2+, Ni2+, Pb2+, and Cd2+, both HGs could adsorb all the ions and their behavioral trend was the same in both cases, in which the adsorption efficiency was Pb2+ > Cu2+ > Cd2+ > Ni2+. The results of the statistical analysis evidence the advantage of its use in this type of studies. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46999

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Section: Introductionmentioning

confidence: 94%

Use of super absorbent hydrogels derivative from acrylamide with itaconic acid and itaconates to remove metal ions from aqueous solutions

El‐Halah

Machado

González

et al. 2018

J of Applied Polymer Sci

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“…(1) from the Doehlert design allowed us to obtain the response surface, which shows an effective way to obtain the optimum values for the variables. Absorbance = 0.10589 + 0.03149pH -0.005442pH 2 + 0.1277CC -0.106959CC 2 + 0.01063pHCC.…”

Section: Final Optimization Using the Doehlert Designmentioning

confidence: 99%

“…1 Some advantages of solid-phase extraction over liquid-liquid extraction include easy automation, easy regeneration of the sorbent, a high preconcentration factor and the absence of large amounts of hazardous solvents. 2 In the field of atomic spectrometry, solid-phase extraction is often used for tracemetal enrichment using flow-injection analysis, due to the ease of coupling to spectroanalytical techniques, such as FAAS, ICP OES and GFAAS. [3][4][5] Moreover, flow solid-phase preconcentration systems also allows an increase in the sample throughput and reduce sample/reagent consumption.…”

Section: Introductionmentioning

confidence: 99%

Thermospray Flame Furnace-AAS Determination of Copper after On-line Sorbent Preconcentration Using a System Optimized by Experimental Designs

2005

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Solid-phase extraction procedures are commonly employed in many fields of analytical science for the separation or enrichment of chemical species in different kinds of samples. 1 Some advantages of solid-phase extraction over liquid-liquid extraction include easy automation, easy regeneration of the sorbent, a high preconcentration factor and the absence of large amounts of hazardous solvents. 2 In the field of atomic spectrometry, solid-phase extraction is often used for tracemetal enrichment using flow-injection analysis, due to the ease of coupling to spectroanalytical techniques, such as FAAS, ICP OES and GFAAS. [3][4][5] Moreover, flow solid-phase preconcentration systems also allows an increase in the sample throughput and reduce sample/reagent consumption. During the optimization of a flow-solid phase preconcentration procedure there are some experimental variables related to both the flow and the chemical conditions that may affect the performance of the system. Commonly, when a study considering the variables is carried out by the traditional univariate method, the procedure is quite time consuming and not very economical; often, the best conditions are difficult to attain. On the other hand, multivariate optimization provides a reduced number of experiments and allows an understanding of the influence of several variables as well as their interaction effects. 6 Thus, when a new analytical method is proposed and its optimization process is carried out by multivariate design, the first step in trying to obtain significant variables is accomplished by experimental screening, such as a full factorial, fractional factorial or when many variables are involved in the optimization, a Plackett-Burman type optimization is used. 7 After establishing the significant variables, more complex designs, including central composite, Doehlert design, face centered cube and others are commonly indicated. 8 In this way, recent work has shown the remarkable advantage of experimental designs based on multivariate optimization for obtaining the optimum conditions in preconcentration systems coupled to atomic spectrometry techniques, such as GFAAS, ICP OES and FAAS. 5,9,10 Due to simplicity, low cost and low power detection when compared to GFAAS and ICP OES, FAAS has been the technique most often employed for this purpose. 11,12 Indeed, preconcentration systems coupled to FAAS are powerful approaches for trace-metal enrichment. Recently, a new approach to the atomic-spectrometry technique, namely thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS), 13 has shown itself to be an outstanding analytical technique for coupling to a flowpreconcentration system, thus making it possible to obtain simple, cost effective and sensitive methods for the determinations of metals at the µg/dm 3 levels. Because it is a very recent technique, the application of TS-FF-AAS for metal determination in real samples has been reported in only a few The present paper describes the on-line coupling of a flow-injection system to a new ...

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“…[1,2] However, several ultratrace analysis procedures have also been performed using flame atomic absorption spectrometry (FAAS) coupled to a prior preconcentration system. [7] In general, on-line preconcentration systems using a solid sorbent can be classified into two different classes of materials. [3 -5] Recently, a review about preconcentration procedures for metal determination using atomic spectrometry techniques has described several methods for preconcentration based on coprecipitation, precipitation, electrochemical, Tarley et al 1438 ORDER REPRINTS liquid -liquid extraction (both cloud point liquid -liquid extraction and liquid membranes), and solid-phase extraction.…”

Section: Introductionmentioning

confidence: 99%

Factorial Design and Doehlert Matrix in Optimization of Flow System for Preconcentration of Copper on Polyurethane Foam Loaded with 4‐(2‐Pyridylazo)‐resorcinol

Tarley

Santos

et al. 2004

Analytical Letters

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The present paper describes a flow preconcentration system for copper determination by flame atomic absorption spectrometry (FAAS) based on the sorption of Cu(II) ions onto a mini-column of polyurethane ORDER REPRINTS foam (PUF) loaded with a chromogenic reagent [4-(2-pyridylazo)resorcinol (PAR)]. The variables associated with flow preconcentration system performance, such as pH, buffer concentration (BC), and sampling flow rate (SF), were optimised using a full factorial (2 3 ) design plus a central point and Doehlert matrix. The results obtained, based on the Pareto chart and analysis of variance (ANOVA), demonstrated that pH and BC, as well as the interaction (pH Â BC) are statistically significant at the 95% confidence level. By using 20 mL of sampling volume the proposed method, under conditions optimised by the Doehlert matrix (formation of Cu(II)-PAR (1 : 2) complex at pH 6.4, 0.017 mol L 21 phosphate BC, and 10 mL min 21 SF), allows to determine Cu(II) ions with a detection limit of 0.35 mg L 21 and precision (n ¼ 8) as relative standard deviation (RSD) of 3.2 and 1.1 for copper solutions containing 10 and 30 mg L 21 , respectively. Also, a satisfactory linear range (1.2-40 mg L 21 ), an enrichment factor of 105 and a sample throughput of 28 hr 21 were achieved. Interference studies showed that the PUF-PAR mini-column retains Cu(II) ions in the presence of several transition and alkali metals without presenting interferences. The method was applied for copper determination in water samples (mineral and tap water) and high salt aqueous samples (physiological serum containing 0.9% (m/v) NaCl). The validation of the method was checked by analysing the Cu(II) content in the samples, as well as from analyte addition. The recoveries ranged from 91.0% to 101.1%.

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Flow injection system for cadmium preconcentration on poly(octadecyl diitaconate) (PDI-18) and atomic absorption spectrometry detection

Cited by 19 publications

References 34 publications

Use of super absorbent hydrogels derivative from acrylamide with itaconic acid and itaconates to remove metal ions from aqueous solutions

Use of super absorbent hydrogels derivative from acrylamide with itaconic acid and itaconates to remove metal ions from aqueous solutions

Thermospray Flame Furnace-AAS Determination of Copper after On-line Sorbent Preconcentration Using a System Optimized by Experimental Designs

Factorial Design and Doehlert Matrix in Optimization of Flow System for Preconcentration of Copper on Polyurethane Foam Loaded with 4‐(2‐Pyridylazo)‐resorcinol

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