Determination of zinc and copper in human hair by slurry sampling employing sequential multi-element flame atomic absorption spectrometry

Ferreira, Hadla S.; Santos, Walter Nei Lopes dos; Fiúza, Raigenis da Paz; Nóbrega, Joaquim de Araújo; Ferreira, Sérgio Luís Costa

doi:10.1016/j.microc.2007.06.005

Cited by 30 publications

(10 citation statements)

References 19 publications

(16 reference statements)

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“…Trace heavy metals are essential micro-nutrients and have a variety of biochemical functions in all living organisms [1][2][3]. While trace elements are essential, they can be toxic when taken in excess.…”

Section: Introductionmentioning

confidence: 99%

“…Environmental sample take up trace metals from soils, fertilizers, air, industrial process and transportation. Heavy metals are mobile and easily taken up by plants in the environment [1][2][3][4]. Due to these important points, the accurate determinations of trace heavy metals are important part of the studies in analytical chemistry [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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A preconcentration system for determination of copper and nickel in water and food samples employing flame atomic absorption spectrometry

Tüzen

Soylak

Çıtak

et al. 2009

Journal of Hazardous Materials

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120

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A preconcentration system for determination of copper and nickel in water and food samples employing flame atomic absorption spectrometry

Tüzen

Soylak

Çıtak

et al. 2009

Journal of Hazardous Materials

Self Cite

120

View full text Add to dashboard Cite

“…Some trace heavy metals are considered to be among the vital micronutrients, and they have a wide range of biochemical functions in all living organisms [1][2][3]. Zinc is one of the significant ingredients of proteins involved in intermediary metabolism, hormone secretion pathway, and immune system, and its enzymes participate in synthesis and decomposition of proteins, lipids, carbohydrates, and nucleic acids [4,5].…”

Section: Introductionmentioning

confidence: 99%

Solid Phase Extraction Utilization for Colorimetric Determination of Zinc in Waters, Food, Milk, and Biological Samples

S¹,

MN²,

AG³

2019

Int J Analyt Bioanalyt Methods

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A highly rapid, sensitive, and selective method for the determination of zinc based on the reaction of zinc(II) with 5-amino-2-(phenyldiazenyl)phenol (ACDP) and/or 5-amino-2-(ptolyldiazenyl)phenol (ATDP) and the solid phase extraction of the Zn(II)-ACDP and/or ATDP complex with Amberlite XAD-2000 was developed, in the presence of pH = 5.6 and 6.2 using ACDP and ATDP, respectively, and Triton X-114 medium. ACDP and/or ATDP reacts with zinc to form a violet complex with a molar ratio of 2:1 (ACDP and/or ATDP to zinc). This complex was enriched by the solid phase extraction with Amberlite XAD-2000. An enrichment factor of 500 was obtained by elution of the complex from the resin with a minimal amount of isopentyl alcohol (0.2 ml). In isopentyl alcohol medium, the molar absorptivity of the complex is 1.13 × 10 6 and 1.37 × 10 6 L/mol cm at 647 and 662 nm using ACDP and ATDP, respectively, against a reagent blank prepared in a similar way without zinc. Beer's law is obeyed in the range of 5.0-160 ng/ml in the measured solution. The relative standard deviation for 10 replicate samples of 50 ng/ml level is 1.26 and 1.47%, respectively. The detection and quantification limits reaches 1.5 and 4.7 ng/ml in the original samples. The presented procedure was successfully applied for determination of zinc content in real samples such as waters, food, milk, and biological samples with satisfactory results.

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“…All reagents and solvents such as (CH 3 COO) 2 was prepared by dissolving 0.095 g of (CH 3 COO) 2 Cu . H 2 O in 25 mL double distilled water.…”

Section: Standard Solution and Reagentsmentioning

confidence: 99%

“…[1][2][3] Due to the positive and negative effects and the toxicity of trace heavy metals on human health and the environment, many researchers are interested in the analysis of trace metal contents of the environmental and the food samples. [4][5][6][7][8][9][10] Tea, one of the most widely consumed beverages in the world, is prepared from the young leaves of tea plants.…”

Section: Introductionmentioning

confidence: 99%

Determination of copper in human hair and tea samples after dispersive liquid-liquid microextraction based on solidification of floating organic drop (DLLME-SFO)

Bahar

Zakerian

2012

J. Braz. Chem. Soc.

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proposto é simples, barato e altamente preciso. Neste estudo, a otimização de parâmetros experimentais que influenciam a extração, como tipo e volume dos solventes de extração e do dispersor, pH, quantidade de agente quelante e tempo de extração foi realizada normalmente usando uma abordagem passo-a-passo, na qual cada fator variou sequencialmente. O efeito dos íons interferentes na recuperação dos analitos também foi investigado. O gráfico de calibração foi linear no intervalo de 5-200 ng mL −1 , com limite de detecção de 3,4 ng mL −1. O desvio padrão relativo (RSD) foi 0,7% (n = 10, C = 2 ng mL -1 ) e o fator de enriquecimento, 28.A simple method of dispersive liquid-liquid microextraction-solidified floating organic drop (DLLME-SFO) prior to flame atomic absorption spectrometry was successfully used for separating and preconcentrating copper in human hair and tea samples. The proposed method was simple, cheap, and has high precision. In this study, optimization of experimental parameters influencing the extraction, such as type and volume of extraction and disperser solvents, pH, the amount of chelating agent and extraction time was normally carried out using a step-by-step approach, in which each factor was varied sequentially. The effect of the interfering ions on the analytes recovery was also investigated. The calibration graph was linear in the range of 5-200 ng mL . The relative standard deviation (RSD) was 0.7% (n = 10, C = 2 ng mL −1 ) and the enhancement factor was 28.Keywords: dispersive liquid-liquid microextraction, solidification, copper determination, tea and human hair analysis IntroductionTrace heavy metals are essential micro-nutrients and have a variety of biochemical functions in all living organisms. [1][2][3] Due to the positive and negative effects and the toxicity of trace heavy metals on human health and the environment, many researchers are interested in the analysis of trace metal contents of the environmental and the food samples. [4][5][6][7][8][9][10] Tea, one of the most widely consumed beverages in the world, is prepared from the young leaves of tea plants. It is considered as a healthy drink that has benefits including the prevention of many diseases. [11][12][13] Although copper is an essential trace element for humans and is an indispensable component for many enzyme systems, Cu can also act as a toxic metal to which a number of pathogenic characteristics have been attributed.14 Therefore, Cu contamination in tea leaves remains a concern, and researches should be done to ensure food safety from excessive Cu contamination.The determination of trace elements in human hair is of basic importance considering that the concentrations of these elements in hair can indicate the levels of these elements in the organism. Therefore, the determination of the metal contents in human hair can be used either as the index of the exposition for potentially toxic elements (poisoning) or as the information of the conditions of health of an individual. 15The accurate and sensitive determinations...

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Determination of zinc and copper in human hair by slurry sampling employing sequential multi-element flame atomic absorption spectrometry

Cited by 30 publications

References 19 publications

A preconcentration system for determination of copper and nickel in water and food samples employing flame atomic absorption spectrometry

A preconcentration system for determination of copper and nickel in water and food samples employing flame atomic absorption spectrometry

Solid Phase Extraction Utilization for Colorimetric Determination of Zinc in Waters, Food, Milk, and Biological Samples

Determination of copper in human hair and tea samples after dispersive liquid-liquid microextraction based on solidification of floating organic drop (DLLME-SFO)

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