Complex-forming organic ligands in cloud-point extraction of metal ions: A review

Pytlakowska, Katarzyna; Kozik, Violetta; Dabioch, Marzena

doi:10.1016/j.talanta.2013.02.037

Cited by 178 publications

(84 citation statements)

References 277 publications

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“…Because of its availability, low cost, non-toxic, and non-flammable properties, triton X-114 as the non-ionic surfactant, is the mostly used surfactant in cloud point extraction. 51 Therefore we also selected this surfactant as a green reagent for MCPE. The concentration of triton X-114 can affect the extraction efficiency and enrichment factor.…”

Section: Effect Of Concentration Of Triton X-114mentioning

confidence: 99%

Application of a Novel Micro-Cloud Point Extraction for Preconcentration and Spectrophotometric Determination of Azo Dyes

Ghasemi¹,

Kaykhaii²

2016

Journal of the Brazilian Chemical Society

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A novel room temperature micro-cloud point extraction procedure using triton X-114 surfactant as extracting phase was developed for preconcentration and extraction of three azo dyes (orange G, methyl orange, and acid red 18) from aqueous samples using molecular absorption spectrophotometry in the visible region. The effects of different parameters such as concentration of surfactant and added salting out reagent (Na 2 SO 4 ), pH and type of diluting solvent on microextraction were studied and optimized. Under optimum conditions, calibration curves were linear in the range of 2.0-10.0, 0.2-1.0 and 2-12 mg L -1 with the detection limit of 1.6, 0.6 and 111.0 μg L -1 for orange G, methyl orange and acid red 18, respectively. The relative standard deviation was better than 13.12%. The method was applied to the determination of the azo dyes in water samples. Keywords: micro cloud point extraction, orange G, methyl orange, acid red 18, water analysis IntroductionThe importance of synthetic dyes in today industries can't be denied.1 Every year, thousands tons of such dyes are consumed in food, paper, leather, and textile industries.2,3 From these industries, large volumes of dyes are released to environment and find their way to water and soil. Environmental pollution with dyes can have dire effect on animal, plants, and human health. [4][5][6][7] One of the most important families of dyes is azo dyes that contain −N=N− bond in their structures.8 So far azo dyes have found many applications. Some azo dyes are quite harmful and poisonous, 9 and even those that are not toxic, like acid red 18, can be harmful if used in excess.10 Therefore the importance of their removal/decolorization 11-13 and their determinations [14][15][16][17] solvent (up to 3 mL). 44 To overcome these problems, in our previous work we introduced a micro-cloud point extraction (MCPE) technique. 45 While sustaining the merits of CPE, in MCPE water bath step is completely eliminated and the consumption of toxic organic solvents has been reduced from a few mL to a few ten μL. These make MCPE a fast, inexpensive, and green technique.In this paper MCPE was successfully applied for the determination of three azo dyes, orange G, methyl orange, and acid red 18 (Figure 1) in tap and wastewater samples. Acid red 18 (Panceau 4R) is a popular food color 46 and many methods have been proposed for its determination. 47,48 Methyl orange (acid orange 52 or gold orange) and orange G (orange gelb or wool orange) have many applications as textile dyeing stuff and staining agents in laboratories. These three dyes are of the most abundant used dyeing agents throughout the world and therefore can find their way to environmental sources as hazardous pollutions. 49,50 To our best knowledge this is the first report of determination of theses dyes with cloud point procedure. Non-ionic surfactant, triton X-114, was used as the extractant phase. Experimental InstrumentA Shimadzu UV-Vis spectrophotometer, UV-160 (Kyoto, Japan), equipped with two microcells (10 μL capacity, Star...

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Section: Effect Of Concentration Of Triton X-114mentioning

confidence: 99%

Application of a Novel Micro-Cloud Point Extraction for Preconcentration and Spectrophotometric Determination of Azo Dyes

Ghasemi¹,

Kaykhaii²

2016

Journal of the Brazilian Chemical Society

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“…Since then CPE was applied widely for determination of various analytes 6,7 , mainly for the extraction of metal ions 8,11 . The most important feature of CPE is application of a surfactant, mostly non-ionic as the extractant phase 12 For preparing all the solutions needing in experiment used high purity materials received from commercial sources without further purification and used Doubly distilled water with set of suitable glassware, stock solution 1mg/mL of Fe 3+ ion prepared by dissolving 0.2880 gm in of FeCl 3 in 100 mL and for Hg 2+ ion dissolved 0.1353 gm of HgCl 2 in 100 mL of distilled water other working solutions preparing by dilution method with distilled water in suitable volumetric flask, so 1×10 -2 M of Na-Benzoyl-L-arginine ethyl ester hydrochloride (BAEE) was prepared by dissolving (0.08571gm) in (25mL) distilled water. Other working solutions were prepared by dilution method with distilled water.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of Onium System with Cloud Point Extraction and Determination of Iron(III) and Mercury(II) in Different Samples

Jawad¹,

Kadhim²,

Azooz³

2017

Orient. J. Chem

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By joined two sensitive methods which in onium method and Cloud point extraction method CPE for separation preconcentration and extraction Fe 3+ and Hg 2+ by using (BAEE) from acidic hydrochloric aqueous solution in the presence TritonX-100. Spectrophotometric studies shows wave length for maximum absorbance to onium species of Fe(III) was λ max =362nm and for Hg(II) λ max =293nm. Optimum condition studies was 1M HCl for both ions, 100µg of each metal ions ,using 1×10 -4 M of (BAEE), as well as the method need heating for 85 0 C to Fe 3+ and 95 0 C for Hg 2+ ion and heating time 15min. for Fe 3+ and 20min. for Hg 2+ ion. so that need existance 0.5mL of TritonX-100 for both metal ion, the research involved many other studies. keyword: Cloud point extraction, onium system, Na-Benzoyl-L-arginine ethyl ester hydrochloride (BAEE), mercury, iron.

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“…The main applications of thiazolylazo dyes in chemistry include spectrophotometry, liquid and cloud point extraction, solid-phase extraction, electrochemistry, liquid chromatography (precolumn derivatization HPLC) and separation procedures [8][9][10][11]. Thiazolylazo dyes have also been employed as indicators, masking agents and sorbents in combination with solid supports [12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, structural characterization and thermal studies of a novel reagent 1-[(5-benzyl-1,3-thiazol-2-yl)diazenyl]naphthalene-2-ol

Tupys

Kalembkiewicz

Ostapiuk

et al. 2016

J Therm Anal Calorim

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A new thiazolylazo reagent 1-[(5-benzyl-1,3-thiazol-2-yl)diazenyl]naphthalene-2-ol has been synthesized via arylation of acrolein and further diazotization and diazocoupling with 2-naphthol. The chemical structure of the compound was confirmed by IR, NMR: 1 H, 13 C, COSY, HSQC and SALDI-MS spectral data. The DSC method was employed to determine the melting point and the enthalpy of fusion (T fus = 159.7°C and DH fus = 28.0 kJ mol -1 , respectively). Thermal stability and decomposition studies of the obtained azo dye were performed in air and nitrogen atmosphere using the TG technique. The evolved gases from the heated sample were registered on FTIR spectra. The decomposition of the azo dye in air atmosphere occurred in five consecutive stages. The pK a ionization constants of the substance were determined in ethanol-water mixture (1:1 v/v) by means of the spectroscopic method and were found to be equal to 0.41 for pK a1 and 9.59 for pK a2 . Using the spectrophotometric procedures, the methods for determination of trace amounts of toxic metallic ions with the new reagent were characterized and limits of detection were calculated.

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Complex-forming organic ligands in cloud-point extraction of metal ions: A review

Cited by 178 publications

References 277 publications

Application of a Novel Micro-Cloud Point Extraction for Preconcentration and Spectrophotometric Determination of Azo Dyes

Application of a Novel Micro-Cloud Point Extraction for Preconcentration and Spectrophotometric Determination of Azo Dyes

Incorporation of Onium System with Cloud Point Extraction and Determination of Iron(III) and Mercury(II) in Different Samples

Synthesis, structural characterization and thermal studies of a novel reagent 1-[(5-benzyl-1,3-thiazol-2-yl)diazenyl]naphthalene-2-ol

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