Cobalt(III) Hexamethylenedithiocarbamate as a New Collector for Flotation Preconcentration of Iron, Nickel, Lead, and Zinc Prior to ETAAS

Ay, Ümit; Čundeva, Katarina; Akçin, Göksel; Stafilov, Trajče; Zajkova, Vesna; Pavlovska, Gorica

doi:10.1081/al-120029746

Cited by 8 publications

(5 citation statements)

References 16 publications

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“…Its role as a collector is not decisive for total quantitative removing of analytes from water media at lower pHs, which is sometimes very important criterion to separate heavy metals from alkaline earth metals present in some water matrices. [27][28][29][30]32,33] Therefore coprecipitation with Cr 2 O 3 · xH 2 O had to be modified and ameliorated by addition of PMA-PMDTC to form Cr(PMDTC) 3 as an additional collector with far more ability to collect metal species quantitatively at lower pHs.…”

Section: Effect Of Ph Variation During the Flotation By Cr 2 O 3 · Xhmentioning

confidence: 99%

Electrothermal atomic absorption spectrometric determination of cadmium and lead in traces in aquatic systems following flotation by two chromium(III) collectors

Kormušoska¹,

Čundeva

Stafilov

2009

Journal of Environmental Science and Health, Part A

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A fast flotation method for determination of cadmium and lead in aquatic systems by two chromium(III) collectors is described. The first collector is a colloid precipitate of hydrated chromium(III) oxide, Cr2O3 x xH2O, while the second is a bulk chromium(III) pentamethylenedithiocarbamate, Cr(PMDTC)3. Cadmium and lead present in water are incorporated into the collector mass at pH 7.5 by addition of 20 mg of Cr(III) and 0.4 mmol of pentamethyleneammonium pentamethylenedithiocarbamate, PMA-PMDTC, to 0.5 L water sample. A solid precipitate was separated from the processed water system by air bubbles. After dissolving with strong acid, the solution is tested by electrothermal atomic absorption spectrometry (ETAAS). The limit of detection for Cd by flotation/ETAAS method is 0.002 microg L(-1), while for Pb is 0.04 microg L(-1). The precision of the method is expressed as relative standard deviations ranging of 5.0% for Cd (concentration range from 0.1 to 0.5 microg L(-1)) and 4.25% for Pb (concentration range from 0.5 to 5 microg L(-1)). The characteristic mass (mass that gives an integrated absorbance of 0.0044 s) of 1.06 pg for Cd and 16.7 pg for Pb were obtained. The method was validated by the standard additions and by its application to the reference materials (Surface water-SPS-SW-1, River Thames Water-LGC-6019).

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Section: Effect Of Ph Variation During the Flotation By Cr 2 O 3 · Xhmentioning

confidence: 99%

Electrothermal atomic absorption spectrometric determination of cadmium and lead in traces in aquatic systems following flotation by two chromium(III) collectors

Kormušoska¹,

Čundeva

Stafilov

2009

Journal of Environmental Science and Health, Part A

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“…Colloidal precipitate flotation has been performed by many types of substances that have the role of a collector as semicarbazide, [11] solutes [12] and dithiocarbamates. [13][14][15][16][17][18][19][20][21][22][23][24][25][26] Dithiocarbamates are small organic molecules with a high capacity of forming complexes with heavy metals. [27] Iron(III) tetramethylenedithiocarbamate, Fe(TMDTC) 3 and iron(III) hexamethylenedithiocarbamate, Fe(HMDTC) 3 are proven to be good collectors for flotation concentration and separation of many heavy metals in water samples.…”

Section: Introductionmentioning

confidence: 99%

“…[13][14][15][16][17][18][19][20][21] These collectors cannot be used for determination on Fe, because they contain Fe, but we found that it can be successfully determined by lead(II) hexamethylenedithiocarbamate, Pb (HMDTC) 2 and cobalt(III) hexamethylenedithiocarbamate Co(HMDTC) 3 . [22,23] In this article the methods for the determination of Fe in drinking water using two new collectors Pb(HpDTC) 2 and Co(HpDTC) 3 are presented. These collectors have proven to be good flotation reagents for successful separation and concentration on Cd, Cu and Pb.…”

Section: Introductionmentioning

confidence: 99%

Determination of iron in drinking water after its flotation concentration by two new dithiocarbamate collectors

Pavlovska

Stafilov

Čundeva

2015

Journal of Environmental Science and Health, Part A

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Two new methods for the determination of iron by atomic absorption spectrometry (AAS) are proposed for drinking water. The determination was made after flotation concentration of Fe by using of two new flotation collectors: lead(II) heptyldithiocarbamate, Pb(HpDTC)2 and cobalt(III) heptyldithiocarbamate Co(HpDTC)3. All important parameters for the two proposed procedures were optimised (pH, mass of Pb, mass of Co, amount of HpDTC(-), type of surfactant, induction time, etc.). Flotation recovery (R) of Fe was very high (from 94.4 to 104.4%) for the two proposed procedures. The detection limit of the methods was 2.17 μg L(-1) for Pb(HpDTC)2 and 2.39 μg L(-1) for Co(HpDTC)3, respectively. The proposed methods have been applied for the analysis of five samples of drinking water. The acquired AAS results for Fe by both new methods were compared with those obtained by inductively coupled plasma-atomic emission spectrometry (AES-ICP). It is shown that they are in good agreement. The results are also confirmed by the method of standard additions.

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“…[12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] Many factors influence to perform a proper flotation, but an important role has the collector with its colloid nature. [10][11][12] In our earlier work lead(II) hepthyldithiocarbamate, Pb(HpDTC) 2 , and cobalt(III) hepthyldithiocarbamate, Co(HpDTC) 3 , were used as collectors for copper and cadmium preconcentration.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12] In our earlier work lead(II) hepthyldithiocarbamate, Pb(HpDTC) 2 , and cobalt(III) hepthyldithiocarbamate, Co(HpDTC) 3 , were used as collectors for copper and cadmium preconcentration. 27,28 The idea of this study is to apply iron(III) hepthyldithiocarbamate, Fe(HpDTC) 3 , for flotation separation of chromium, copper and lead traces from water samples prior to ETAAS determination. One of the most important advantage of using Fe(HpDTC) 3 instead Co(HpDTC) 3 and Pb(HpDTC) 2 is the possibility of chromium determination.…”

Section: Introductionmentioning

confidence: 99%

Fe(III) hepthyldithocarbamate as a new collector for flotation separation and preconcentration of Cr, Cu, and Pb from fresh waters before their determination by ETAAS

Čundeva¹,

Pavlovska²,

Stafilov³

2007

J. Braz. Chem. Soc.

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eletrotérmica (ETAAS). A possibilidade da aplicação de heptilditiocarbamato de ferro(III), Fe(HpDTC) 3 , como coletor foi estudada. Os parâmetros experimentais que influenciam a eficiência da flotação do coletor foram otimizados. Constatou-se que Cr(III), Cr(VI), Cu(II) e Pb(II) podem ser separados simultaneamente pela adição de 20 mg de Fe(III) e 6 mL de HpDTC -0,1 mol L -1 a 1 L de uma amostra teste, em pH 6,5. O fator de preconcentração do método é 40. A aplicabilidade do novo procedimento proposto foi verificada pelo método de adições padrão e por espectrometria de emissão óptica com plasma indutivamente acoplado (ICP OES) como um método comparativo independente. O limite de detecção para Cu pelo método de flotação/ ETAAS é 0,015 µg L -1 , 0,011 µg L -1 para Cr e 0,025 µg L -1 para Pb. Determinou-se que para concentrações baixas (de 0,025 a 0,2 µg L -1 ), o RSD para Cu é 1,5%; para Cr, 4,2% e para Pb é 7,8%; enquanto que para níveis de concentração mais altos (de 0,2 a 4,5 µg L -1 ), RSD para Cu é 1,7%, para Cr 2,8% e para Pb é 3,7%.A method for determination of Cr, Cu and Pb in fresh waters, after flotation separation and preconcentration step, by using electrothermal atomic absorption spectrometry (ETAAS) is presented. The possibility of applying iron(III) hepthyldithiocarbamate, Fe(HpDTC) 3 , as a collector is studied. The experimental parameters affecting the flotation efficiency by a new collector were optimized. It is ascertained that Cr(III), Cr(VI), Cu(II) and Pb(II) can be separated simultaneously from matrix by addition of 20 mg Fe(III) and 6 mL 0.1 mol L -1 HpDTC -to a test sample of 1 L at pH 6.5. The preconcentration factor of the method is 40. The applicability of the new proposed procedure was verified by the method of standard additions and by inductively coupled plasma optical emission spectrometry (ICP OES), as an independent comparative method. The limit of detection for Cu by flotation/ETAAS method is 0.015 µg L -1 , for Cr is 0.011 µg L -1 , and for Pb 0.025 µg L -1 . It was found that for low concentrations (from 0.025-0.2 µg L -1 ) RSD for Cu is 1.5%, for Cr 4.2% and for Pb is 7.8%, while for the higher concentration level (from 0.2-4.5 µg L -1 ) RSD for Cu is 1.7%, for Cr 2.8% and for Pb is 3.7%.

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Cobalt(III) Hexamethylenedithiocarbamate as a New Collector for Flotation Preconcentration of Iron, Nickel, Lead, and Zinc Prior to ETAAS

Cited by 8 publications

References 16 publications

Electrothermal atomic absorption spectrometric determination of cadmium and lead in traces in aquatic systems following flotation by two chromium(III) collectors

Electrothermal atomic absorption spectrometric determination of cadmium and lead in traces in aquatic systems following flotation by two chromium(III) collectors

Determination of iron in drinking water after its flotation concentration by two new dithiocarbamate collectors

Fe(III) hepthyldithocarbamate as a new collector for flotation separation and preconcentration of Cr, Cu, and Pb from fresh waters before their determination by ETAAS

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