Determination of Cu2+, Zn2+ and Pb2+ in biological and food samples by FAAS after preconcentration with hydroxyapatite nanorods originated from eggshell

Mortada, Wael I.; Kenawy, Ibrahim M.; Abdelghany, A.M.; Ismail, Amani; Donia, Ahmed Farouk; Nabieh, Kareem A.

doi:10.1016/j.msec.2015.03.061

Cited by 63 publications

(13 citation statements)

References 45 publications

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“…The results in Table (1) show that 0.5 mol L −1 thiourea has the maximum ability to desorb Pd 2+ from RH@MCM-41@ARS. We avoided the use of acids due to its denaturation effects on the sorbent which can decrease its reusability [ 37 ]. Therefore, 0.5 mol L −1 thiourea was used as eluent through the study.…”

Section: Resultsmentioning

confidence: 99%

Chemically modified rice husk as an effective adsorbent for removal of palladium ions

Nabieh

Mortada

Helmy

et al. 2021

Heliyon

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Bio-matrix of rice husk and Mobil Composition of Matter No. 41 (MCM-41) was modified with alizarin red S for preconcentration of Pd 2+ prior flame atomic absorption spectrometric determination. The prepared bio-matrix (RH@MCM-41@ARS) was characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscope, energy dispersive X-ray spectrometer (SEM/EDX) and surface area studies. The impact of different parameters (solution pH, amount of sorbent, contact time, sample volume, initial Pd 2+ concentration and diverse ions) on the uptake of Pd 2+ were evaluated. The maximum adsorption capacity of Pd 2+ onto RH@MCM-41@ARS was 198.2 mg g −1 at optimum conditions. Applying the optimized procedure as a preconcentration step led to limit of detection of 0.13 μg L −1 and dynamic analytical range up to 500 μg L −1 . The sorbent was regenerated by 0.5 mol L −1 thiourea for at least 10 cycles without significant reduction of adsorption capacity. The method was applied for preconcentration of Pd 2+ from real samples.

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Section: Resultsmentioning

confidence: 99%

Chemically modified rice husk as an effective adsorbent for removal of palladium ions

Nabieh

Mortada

Helmy

et al. 2021

Heliyon

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“…It also determine the ability of metal ions to bind the active sites on the sorbent surface. 31 The effect of pH on the sorption of Ga 3þ , In 3þ and Tl 3þ onto HBAAS was studied by the batch procedure at pH 1-4. Figure 2 shows that the extraction recovery of metal ions depends on the sample pH.…”

Section: Batch Techniquementioning

confidence: 99%

“…In continuation of our previous work in this field, 7–9,29–31 we introduce in this study a procedure for the separation and preconcentration of trace amounts of Ga 3+ , In 3+ and Tl 3+ using amino silica modified with 2-hydroxy-5 -(2-hydroxybenzylideneamino)benzoic acid (HBAAS), prior to their determination by FAAS. The factors affecting the separation process were studied in both batch and column modes.…”

Section: Introductionmentioning

confidence: 99%

Solid Phase Extraction and Preconcentration of Trace Gallium, Indium, and Thallium Using New Modified Amino Silica

et al. 2016

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Amino silica gel functionalized with 2-hydroxy-5 -(2-hydroxybenzylideneamino)benzoic acid was synthesized, characterized and used as adsorbent for the removal of Ga, In and Tl from aqueous solution prior to their determination by flame atomic absorption spectrometry. Experimental parameters that affect the separation process were investigated in both batch and column modes. The maximum adsorption capacities of the sorbent are 61.7 mg g, 81.3 mg g and 133.0 mg g for Ga, In and Tl, respectively. The preconcentration factor is 200 and the limits of detection of Ga, In and Tl are 4.10 μg L, 1.55 μg L and 1.21 μg L, respectively. Interference by Al can be masked by the addition of F; and that of Fe by its reduction to Fe using 10% ascorbic acid. The method was successfully applied for the determination of these ions in water, sediments and liquid crystal display samples.

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“…For determining the low concentration of Pb in blood serum by flame AAS, Barbosa with coauthors [6] used oxidized carbon nanotubes covered with bovine serum albumin layers; preconcentration was performed in untreated blood serum and allowed getting LOD of Pb at the level of 2 μg/L. Mortada with coauthors [7] suggested hydroxyapatite nanorods prepared from recycled eggshell for solid phase extraction of Pb, Cu and Zn from solutions of different biological samples followed by AAS analysis. In spite of undeniable progress in developing the above-mentioned methods, the analysis of biological samples using solid sampling is very attractive as the analytical procedure is simple and risk of contamination and analyte losses is improbable.…”

Section: Introductionmentioning

confidence: 99%

Minor and Trace Elements in Whole Blood, Tissues, Proteins and Immunoglobulins of Mammals

Zaksas¹,

Nevinsky²

2018

Trace Elements - Human Health and Environment

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Microelements play different important roles in many physiological processes in all biological systems in both normal physiological and pathological conditions. They take part in the transport of nutrients and gases, support temperature, acid-base balance, homeostasis of the human organisms, maternal and child mental health, the functioning of enzymes, protein and DNA syntheses, cytoskeleton activation, etc. We have performed simultaneous determination of a number of minor and trace elements in whole blood and tissues of mammals by two-jet plasma atomic emission spectrometry (TJP-AES). TJP-AES allows direct analysis of powders without wet acid digestion and can be used for analysis of both large and small amount of the sample, which is important for biomedical investigations with humans and experimental animals. In addition, a content of different elements in preparations of human immunoglobulins was estimated by TJP-AES as well as using different physicochemical methods, the functional role of metal ions in antibodies functioning was analyzed. The analysis of the relative activity of antibodies with catalytic activity (abzymes) in the hydrolysis of DNA, RNA, proteins, peptides and oxidation-reduction reactions and the role of metal ions in the catalysis of these reactions by abzymes were carried out.

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Determination of Cu2+, Zn2+ and Pb2+ in biological and food samples by FAAS after preconcentration with hydroxyapatite nanorods originated from eggshell

Cited by 63 publications

References 45 publications

Chemically modified rice husk as an effective adsorbent for removal of palladium ions

Chemically modified rice husk as an effective adsorbent for removal of palladium ions

Solid Phase Extraction and Preconcentration of Trace Gallium, Indium, and Thallium Using New Modified Amino Silica

Minor and Trace Elements in Whole Blood, Tissues, Proteins and Immunoglobulins of Mammals

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