Determination of cobalt and nickel in water samples by flame atomic absorption spectrometry after cloud point extraction

Chen, Jianrong; Teo, Khay Chuan

doi:10.1016/s0003-2670(01)00849-2

Cited by 193 publications

(77 citation statements)

References 28 publications

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“…They include functional groups that can form strong complexes with metals. In recent literature, some ligands, such as ammonium pyrrolidinedithiocarbamate (APDC), 33 1-(2-pyridylazo)-2-naphthol (PAN), 34 1-(2-thiazolyazo)-2-naphthol (TAN), 35 O,Odiethyldithiophosphate (DDTP), 36 2-amino-cyclopentene-1-dithiocarboxylic acid (ACDA), 37 diethyldithiocarbamate (DDTC), 38 8-hydroxyquinoline (oxine), 39 dithizone, 40 and 2-(5-bromo-2-pyridylazo)-5-(diethylamino)phenol (Br-PADAP) 41 have been especially used for the preconcentration of different metals. The complexes form with ligands in individual pH values for one or two element with their active centers.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Bis(amino alcohol)oxalamides and Their Usage for the Preconcentration of Trace Metals by Cloud Point Extraction

et al. 2008

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C2-Symmetric two bis(amino alcohol)oxalamides (diamidediols) were synthesized and fully characterized. A new method was developed and successfully applied for the simultaneous preconcentration of both trace and toxic metals in water, by using C2-symmetric compounds. Under the optimum experimental conditions (i.e. pH = 10.10% w/v octylphenoxy-polyethoxyethanol (Triton X-114)), calibration graphs were linear in the range of 2.5 -25.0 ng mL -1 for Cu and Cd, 5.0 -25.0 ng mL -1 for Co and Ni. The enrichment factors were 18, 23, 18 and 20 for Cd, Cu, Co and Ni in the case of DAD1, respectively; 20, 22, 17 and 20 for Cd, Cu, Co and Ni in the case of DAD2. The limits of detection for DAD1 were found to be 0.45, 0.50, 1.25 and 0.60 ng mL -1 for Cd, Cu, Co and Ni, respectively, and for DAD2 were found to be 0.44, 0.25, 0.60 and 1.55 ng mL -1 for Cd, Cu, Co and Ni, respectively. The developed method was applied to the determination of Cu, Cd, Co and Ni in water samples and certified reference materials with satisfactory results.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Bis(amino alcohol)oxalamides and Their Usage for the Preconcentration of Trace Metals by Cloud Point Extraction

et al. 2008

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“…In particular, the traditional liquid-liquid extraction method is also dangerous to analysts because of the large volume of volatile organic solvent required. So in the last decades, the green liquid-liquid extraction method cloud point extraction (CPE) has been employed in analytical chemistry to 0039 preconcentrate organic compounds [6][7][8] and metal ions [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Determination of estrogens in water by HPLC–UV using cloud point extraction

Wang

Cai

et al. 2006

Talanta

134

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A method based on cloud point extraction was developed to determine four kinds of estrogens: estriol (E3), estradiol (E2), estrone (E1), and progesterone (P) in water by high performance liquid chromatography separation and ultraviolet detection (HPLC-UV). The non-ionic surfactant Triton X-114 was chosen as extractant solvent. The parameters affecting extraction efficiency, such as concentrations of Triton X-114 and Na 2 SO 4 , equilibration temperature, equilibration time and centrifugation time were evaluated and optimized. Under the optimum conditions, preconcentration factors of 99 for E3, 73 for E2, 152 for E1 and 86 for P were obtained for 10 mL water sample. The detection of limitation was 0.23 ng mL −1 for E3, 0.32 ng mL −1 for E2, 0.25 ng mL −1 for E1 and 5.0 ng mL −1 for P. The proposed method was successfully applied to the determination of trace amount of estrogens in wastewater treatment plant (WWTP) effluent water and exposure water with 10 ng mL −1 E2 for toxicological study in our lab. For the case of WWTP effluent water samples, no estrogen was found. The accuracy of the proposed method was tested by recovery measurements of spiked samples and good recoveries of 81.2-99.5% were obtained.

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“…However, the amount of used solvent is still in the order of several hundred micro liters per analysis. Also preconcentration of cobalt in some CPE methods has been reported (Bezerra et al, 2007;Chen & Teo, 2001;Donati et al, 2006;Ghaedi et al, 2008;Gil et al, 2008;Nascentes & Arruda, 2003;Safavi et al, 2004;Shemirani & Shokoufi, 2006;Shokoufi et al, 2007b). Despite many benefits from the use of CPE, in high content of salt, background is increased since the enrichment phase is composed of a little aqueous sample and in very high content of salt, the density of the sample becomes equal or even higher than that of micelles, therefore they can not be settled.…”

Section: Cobalt; the Occurrence Benefits And Applications Exposure mentioning

confidence: 99%

Cold-Induced Aggregation Microextraction: A Novel Sample Preparation Technique Based on Ionic Liquids for Preconcentration of Cobalt Prior to Its Determination by Fiber Optic-Linear Array Detection Spectrophotometry in Real Water Samples

Gharehbaghi¹,

Shemirani²,

Farahani³

et al. 2011

Ionic Liquids: Applications and Perspectives

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Determination of cobalt and nickel in water samples by flame atomic absorption spectrometry after cloud point extraction

Cited by 193 publications

References 28 publications

Synthesis of Bis(amino alcohol)oxalamides and Their Usage for the Preconcentration of Trace Metals by Cloud Point Extraction

Synthesis of Bis(amino alcohol)oxalamides and Their Usage for the Preconcentration of Trace Metals by Cloud Point Extraction

Determination of estrogens in water by HPLC–UV using cloud point extraction

Cold-Induced Aggregation Microextraction: A Novel Sample Preparation Technique Based on Ionic Liquids for Preconcentration of Cobalt Prior to Its Determination by Fiber Optic-Linear Array Detection Spectrophotometry in Real Water Samples

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