Simultaneous flow injection preconcentration of lead and cadmium using cloud point extraction and determination by atomic absorption spectrometry

Silva, Edson Luiz; Roldan, Paulo dos Santos

doi:10.1016/j.jhazmat.2008.03.100

Cited by 142 publications

(63 citation statements)

References 27 publications

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“…A comparison of the current method with the other reported methods [16][17][18][19] is shown in Table 3. The results showed that, the enrichment factor and the detection limit obtained by the proposed method are comparable to methods reported in the literature.…”

Section: Comparison Of Ll-dllme Procedures With the Other Reported Metmentioning

confidence: 99%

Combination of flame atomic absorption spectrometry with ligandless-dispersive liquid- liquid microextraction for preconcentration and determination of trace amount of lead in water samples

Mohammadi¹,

Shamspur²,

Baghelani³

2013

Bull. Chem. Soc. Eth.

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ABSTRACT.A new ligandless-dispersive liquid-liquid microextraction method has been developed for the separation and flame atomic absorption spectrometry determination of trace amount of lead(II) ion. In the proposed approach 1,2-dicholorobenzene and ethanol were used as extraction and dispersive solvents. Factors influencing the extraction efficiency of lead, including the extraction and dispersive solvent type and volume, pH of sample solution, concentration of chloride and extraction time were studied. Under the optimal conditions, the calibration curve was linear in the range of 7.0-6000 ng mL −1 of lead with R 2 = 0.9992 (n = 10) and detection limit based on three times the standard deviation of the blank (3Sb) was 0.5 ng mL −1 in original solution. The relative standard deviation for eight replicate determinations of 1.0 µg mL -1 lead was ±1.6%. The high efficiency of dispersive liquid-liquid microextraction to carry out the determination of trace amounts of lead in complex matrices was demonstrated. The proposed method has been applied for determination of trace amounts of lead in water samples and satisfactory results were obtained. The accuracy was checked by analyzing a certified reference material from the National Institute of Standard and Technology, Trace elements in water (NIST CRM 1643e).

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Section: Comparison Of Ll-dllme Procedures With the Other Reported Metmentioning

confidence: 99%

Combination of flame atomic absorption spectrometry with ligandless-dispersive liquid- liquid microextraction for preconcentration and determination of trace amount of lead in water samples

Mohammadi¹,

Shamspur²,

Baghelani³

2013

Bull. Chem. Soc. Eth.

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“…Determination of cadmium trace elements in water is still one of the tedious job in analytical chemistry and it requires highly sensitive and accurate analytical methods [3]. Various methods based on solvent extraction [4], ion exchange [5], membrane filtration [6], cloud point extraction [7][8][9], coprecipitation [10,11] and solid phase extraction [12,13] have been developed for the pre-concentration of trace elements in water samples.…”

Section: Introductionmentioning

confidence: 99%

Separation and Determination of Cadmium(II) in Wastewater by Bisolvent of Ester and Ionic Liquid Flotation System

Hou¹,

Li²,

Zhao³

2018

Asian J. Chem.

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In this study, the flotation technology was used to separate and enrich the heavy metal Cd 2+ ions. Based on literature, it was found that Cd 2+ could form CdI4 2-with KI in solution and then (RhB)2(CdI4) was occurred when CdI4 2-was mixed with rhodamine B. This ternary associate was determined by bisolvent of ester and ionic liquid flotation system. Ionic liquid was [Bmim]BF4, the optimal amount of acetic acid, potassium iodide and rhodamine B was 8, 20 and 4 mL, respectively. The best removal efficiency obtained at a flotation time of 15 min with air flow rate of 30 mL/min and 38 % mass fraction of (NH4)2SO4 solution was 95.68 %. The experimental data indicated that the ionic liquid have more excellent function than the traditional organic solvents.

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“…1,2 Rather than others, [3][4][5][6] the most promising, solid phase extraction (SPE) has recently been used for the preconcentration and separation of metal ions 7 owing to its unique selectivity, eco-friendliness, simplicity, and time-cost effectiveness. [8][9][10] A solid-phase (SP) extractor, silica gel (SG) has a poor selectivity and irreversible nature of binding with metal ions; it works at high pH (>7.5), where it becomes hydrolyzed.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of a Luminescent Material, PAN@{SiO2}n, Having a Simultaneous Binding Capacity of High and Low Oxidation States: HOMO and LUMO, Quantum-mechanical Descriptor of Break-through Capacity

et al. 2016

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A time-cost effective, chemically stable mesoporous resin (FSG-PAN), simultaneous binder of two different metal centers (both high (Cd(II)) and low (Tl(I)) oxidation states), has been synthesized by immobilizing azo-dye (1-(2-pyridylazo)-2-napthol: PAN) on functionalized silica gel (FSG). Its corresponding synthesized nano material possesses good luminescent properties, and has been utilized in fluoride sensing at trace levels (1.8 × 10 -6 -7.2 × 10 -6 M). The composition.·51H2O) and structure (tetrahedral) have been well assessed. Under the optimum extraction conditions, the soft extractor (ηFSG-PAN = 1.31 eV), FSG-PAN quantitatively extracts the soft metal centers Cd(II), followed by Tl(I) at its respective HOMO and LUMO by soft-soft interactions. The extractor possesses a high Brunauer-Emmett-Teller (BET) surface area (SABET) (374 m 2 g -1 ), high preconcentration factor (PF, 192), selective pore size and two kinds of break-through capacity (BTCHOMO, 945 μmol g -1 ; BTCLUMO, 120 μmol g -1 ). BTC is spelled out as a function of the electron density over the ligand binding site as analyzed from a DFT calculation.

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Simultaneous flow injection preconcentration of lead and cadmium using cloud point extraction and determination by atomic absorption spectrometry

Cited by 142 publications

References 27 publications

Combination of flame atomic absorption spectrometry with ligandless-dispersive liquid- liquid microextraction for preconcentration and determination of trace amount of lead in water samples

Combination of flame atomic absorption spectrometry with ligandless-dispersive liquid- liquid microextraction for preconcentration and determination of trace amount of lead in water samples

Separation and Determination of Cadmium(II) in Wastewater by Bisolvent of Ester and Ionic Liquid Flotation System

Facile Synthesis of a Luminescent Material, PAN@{SiO2}n, Having a Simultaneous Binding Capacity of High and Low Oxidation States: HOMO and LUMO, Quantum-mechanical Descriptor of Break-through Capacity

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