Cloud point extraction for the determination of cadmium and lead in biological samples by graphite furnace atomic absorption spectrometry

Maranhão, Tatiane de Andrade; Borges, Daniel L. G.; Veiga, Márcia Andréia Mesquita Silva da; Curtius, Adilson José

doi:10.1016/j.sab.2005.02.004

Cited by 98 publications

(45 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Cadmium is well known to be one of the most hazardous elements to human health with a biological half-life in the range of 10-30 years, mainly accumulated in the kidney, liver and lungs [Maranhao et al, 2005]. This element was indicated as a human carcinogen and a causative factor in renal toxicity, pancreatic cancer, enhanced tumor growth, cardiovascular diseases, and in particular, hypertension [Davis et al, 2006].…”

Section: Introductionmentioning

confidence: 99%

Determination of Trace Cd in Alcoholic and Nonalcoholic Beverages by Coupling Cloud Point Extraction with Spectrophotometry

Gürkan¹,

Altunay²

2013

Pol. J. Food Nutr. Sci.

View full text Add to dashboard Cite

A cloud-point extraction (CPE) process using the nonionic surfactant, Triton X-114 to extract Cd(II) ions from aqueous solutions was investigated. The method is based on the ion-pairing reaction of Cd(II) with Victoria blue B (VBB + ) in presence of excess iodide at pH 4.0 and extraction of the complex formed. The chemical variables affecting CPE efficiency were studied, and the analytical characteristics of the method were obtained. The calibration curves were obtained in the ranges of 1.0-30 and 10-500 µg/L for Cd(II) ion with the detection limits of 0.34 and 3.8 µg/L at 608 and 634 nm, respectively. The selectivity study was also tested. The precision (N: 5, 25 µg/L) was 2.85% relative standard deviation. The results obtained for two certified reference samples were in a good agreement with the certified values. The method was successfully applied to the determination of Cd(II) in beverage samples.Brought to you by | MIT Libraries Authenticated Download Date | 5/10/18 11:53 PM

show abstract

Section: Introductionmentioning

confidence: 99%

Determination of Trace Cd in Alcoholic and Nonalcoholic Beverages by Coupling Cloud Point Extraction with Spectrophotometry

Gürkan¹,

Altunay²

2013

Pol. J. Food Nutr. Sci.

View full text Add to dashboard Cite

show abstract

“…Consequently, separation and preconcentration procedures are often needed before GFAAS determination. Various techniques have been applied for the separation and preconcentration of trace Cd and Pb, such as liquid-liquid extraction, 9,10 coprecipitation, 11 solid-phase ex-traction, [12][13][14][15][16] cloud point extraction [17][18][19] and liquid-phase microextraction, 20,21 but the disadvantages such as timeconsuming, unsatisfactory enrichment factors, large organic solvents and secondary wastes, limit their applications. In order to overcome the problems, a novel liquid-liquid extraction technique termed as dispersive liquid-liquid microextraction (DLLME), which is based on a ternary component solvent system like homogeneous liquid-liquid extraction, was proposed recently.…”

Section: Introductionmentioning

confidence: 99%

Determination of Cadmium and Lead in Human Teeth Samples Using Dispersive Liquid‐liquid Microextraction and Graphite Furnace Atomic Absorption Spectrometry

Cheng

Xia

Liang

2011

J Chinese Chemical Soc

View full text Add to dashboard Cite

A new method for the determination of cadmium and lead in human teeth was developed based on dispersive liquid-liquid microextraction preconcentration and graphite furnace atomic absorption spectrometry determination. In the proposed approach, O,O-diethyldithiophosphate (DDTP) was used as a chelating agent, and carbon tetrachloride and methanol were selected as extraction and dispersive solvents. Some factors influencing the extraction efficiency of cadmium and lead and their subsequent determination, including extraction and dispersive solvent type and volume, pH of sample solution, concentration of the chelating agent and extraction time, were studied and optimized. Under the optimum conditions, the enrichment factor of 116 and 68 for cadmium and lead were achieved. The detection limit for cadmium and lead was 5.6 and 45 ng L -1 , and the relative standard deviation (R.S.D) was 4.5% and 3.8% (n = 7, c = 1.0 ng mL -1 ), respectively. Verification of the accuracy of the method was carried out by analysis of a standard reference material (NIST 1486, bone meal). The method was successfully applied to the determination of trace amount of cadmium and lead in human teeth samples with satisfactory results.

show abstract

“…Trace elements can be extracted to the surfactant-rich phase usually after formation of a hydrophobic complex with an appropriate chelating agent [5]. This approach has been successfully employed to extract and pre-concentrate several trace elements from a variety of matrices [6][7][8][9][10][11][12][13][14]. The technique is based on the property of most surfactants in aqueous solutions to form micelles and to separate into a surfactant-rich phase of a small volume and a diluted aqueous phase when heated to a temperature known as the cloud point temperature.…”

Section: Introductionmentioning

confidence: 99%

Development of efficient method for preconcentration and determination of copper, nickel, zinc and iron ions in environmental samples by combination of cloud point extraction and flame atomic absorption spectrometry

et al. 2009

View full text Add to dashboard Cite

A cloud point extraction procedure for the preconcentration of copper, nickel, iron and zinc ions in various samples has been described. Analyte ions in aqueous phase are complexed with 3-((indolin-3-yl)(phenyl)methyl)indoline (IYPMI) and following centrifugation quantitatively extracted to the aqueous phase rich in Triton X-114. The surfactant-rich phase was dissolved in 2.0 mol L−1 HNO3 in methanol prior to metal content determination by flame atomic absorption spectrometry (FAAS). The effects of some parameters including, the concentrations of IYPMI, Triton X-114 and HNO3, bath temperature, centrifuge rate and time were investigated on the recoveries of analyte ions. At optimum conditions, the detection limits of (3 SDb m−1) of 1.6, 2.8, 2.1 and 1.1 ng mL−1 for Cu2+, Fe3+, Ni2+ and Zn2+ along with preconcentration factors of 30 and enrichment factor of 48, 39, 34 and 52 for Cu2+, Ni2+, Fe3+ and Zn2+ respectively, were obtained. The proposed cloud point extraction has been successfully applied for the determination of metal ions in real samples with complicated matrix such as biological, soil and blood samples with high efficiency.

show abstract

Cloud point extraction for the determination of cadmium and lead in biological samples by graphite furnace atomic absorption spectrometry

Cited by 98 publications

References 18 publications

Determination of Trace Cd in Alcoholic and Nonalcoholic Beverages by Coupling Cloud Point Extraction with Spectrophotometry

Determination of Trace Cd in Alcoholic and Nonalcoholic Beverages by Coupling Cloud Point Extraction with Spectrophotometry

Determination of Cadmium and Lead in Human Teeth Samples Using Dispersive Liquid‐liquid Microextraction and Graphite Furnace Atomic Absorption Spectrometry

Development of efficient method for preconcentration and determination of copper, nickel, zinc and iron ions in environmental samples by combination of cloud point extraction and flame atomic absorption spectrometry

Contact Info

Product

Resources

About