Simultaneous Quantitative Determination of Manganese, Iron, Copper and Zinc by Atomic Absorption Spectroscopy in Tropical Cereals, Fruit and Legume Materials

Benzo, Zully; Schorin, H.; Velosa, M.

doi:10.1111/j.1365-2621.1986.tb10875.x

Cited by 10 publications

(3 citation statements)

References 7 publications

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“…Flame atomic absorption spectrometry is a method with simple application and low triggering disbursement [9]. Manifestation limitation of this procedure causes the fact that preconcentration has been known as a necessary step before determination of heavy metals [10,11].…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Application of modified sawdust for solid phase extraction, preconcentration and determination of trace lead in water samples

2019

Asian J. Green Chem.

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A new sorbent was prepared for separation and preconcentration of Pb (II) by using the flame atomic absorption spectrometry. The normative studies on extraction, separation and preconcetration of Pb (II) were represented in this work. This novel method was based on new sorbent by adding diethylenetriamine to sawdust, increasing the incidence exterior. The effect of different parameters including, pH, ligand concentration and sample volume, type and volume of eluent and ligand effect were studied. The optimum pH and preconcentration factor and limit of detection for Pb (II) were 4, 100, and 0.48 µg/L, respectively. In addition, the calibration curve was linear in the range of 0.05-100 mg.mL-1 with R 2 =0.995. The vertical and horizontal confines of calibration diagrams in 500 mL solution were calculated about 0-0.5 mg L-1 and 0-0.6. The results of applying the present method to determinate the separated lead ions in water samples were prosperous and harmonious. Precision of the method was investigated by comparing them with the observations from previous similar researches.

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Section: Graphical Abstract Introductionmentioning

confidence: 99%

Application of modified sawdust for solid phase extraction, preconcentration and determination of trace lead in water samples

2019

Asian J. Green Chem.

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“…Flame atomic absorption spectroscopy (FAAS) is the most widely used technique for heavy metals determination because of its simplicity, low costs for running, and good analytical performance (Benzo and others ). However, ultratrace concentration of metals in environmental samples is lower than the sensitivity and detection limit of this technique.…”

Section: Introductionmentioning

confidence: 99%

Potential of Sawdust as a Green and Economical Sorbent for Simultaneous Preconcentration of Trace Amounts of Cadmium, Cobalt, and Lead from Water, Biological, Food, and Herbal Samples

Baki

Shemirani

Khani

2013

Journal of Food Science

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Application of treated sawdust with NaOH as a green and economical sorbent for simultaneous preconcentration of trace amounts of Cd(II), Co(II), and Pb(II) ions from liver, lettuce, fish, and water as test samples with complicated matrices was investigated. Various parameters, such as effect of pH and contact time, breakthrough volume, type, and concentration of eluent and interference of ions were studied. The sorption was quantitative in the pH of 5.0 to 7.0 and desorption occurred instantaneously with 5.0 mL of mixed solutions of ethanol and 2.0 mol/L HNO3 -HCl and the amount of ions was measured by using flame atomic absorption spectrometry. Linearity was maintained at 3 to 500 μg/L for cobalt, 5.0 to 800 μg/L for lead, and 2.0 to 300 μg/L for cadmium in the original solution. The relative standard deviation was less than 1.80% (n = 6, with concentration of 0.3 mg/L for cadmium and 0.5 mg/L for lead and cobalt). Detection limits and maximum capacity of the sorbent for Co (II), Cd (II), and Pb (II) in the original solution were 0.86, 0.50, and 1.7 μg/L and 28.5, 30.6, and 47.3 mg/g, respectively. The results for spiked real samples, effect of interfering ions, and adsorption capacity indicated that the applicability of this method for lead preconcentration is better than cadmium and cobalt preconcentration from complicated matrices. Practical Application: Sawdust can be applied as a green and economical sorbent for simultaneous preconcentration and solid-phase extraction of metal ions from food and environmental samples with complicated matrices.

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“…According to the international requirements of the Joint FAO/WHO 1 Codex Alimentarius Commission, eight metals require careful hygiene monitoring: mercury, cadmium, lead, arsenic, copper, tin, zinc, iron. The atomic absorption spectroscopy method is the most widely used for determination of zinc in various objects of complex chemical composition [1][2][3][4]. In this case, atomization of the solutions is carried out in an air-acetylene flame, in which no significant elemental interferences are observed in the determination of zinc [5].…”

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Increasing the sensitivity and accuracy of zinc determination in atomic absorption spectrometry

2008

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543.422.5 We have studied the effect of the nature and concentration of surfactants on the analytical signal of zinc. We show that of all the studied surfactants, sodium dodecylbenzenesulfonate increases the sensitivity and selectivity of the zinc determination the most. We have designed a method for atomic absorption determination of zinc in food products using sodium dodecylsulfate as a modifier. The detection limit for zinc according to the proposed procedure is C min = 0.003 µg/mL. Introduction.Increasing demands on chemical analysis are due to both the appearance of new objects to be monitored and also awareness of the significance of previously known objects. The problem of the detection limit for micro amounts of toxicants in food products and improving the accuracy of methods for their determination has become increasingly acute. According to the international requirements of the Joint FAO/WHO 1 Codex Alimentarius Commission, eight metals require careful hygiene monitoring: mercury, cadmium, lead, arsenic, copper, tin, zinc, iron. The atomic absorption spectroscopy method is the most widely used for determination of zinc in various objects of complex chemical composition [1][2][3][4]. In this case, atomization of the solutions is carried out in an air-acetylene flame, in which no significant elemental interferences are observed in the determination of zinc [5]. When using a propanebutane-air flame, we have established that considerable interferences occur due to the chemical composition of the analyte solutions. The use of this flame would be more valuable, since incorporation of the method into analytical practice is hindered because acetylene is expensive and in short supply.The usual aqueous solutions today are increasingly often taking a back seat to other working solutions: "organized media", in particular aqueous micellar solutions of surfactants [6]. Surfactants have been successfully used in atomic absorption analysis [7][8][9][10][11][12][13].The aim of this work was to improve the sensitivity and selectivity of atomic absorption determination of zinc by chemical modification of the analyte solution, and also to establish the feasibility of going from an air-acetylene flame to a low-temperature propane-butane-air flame as a cheaper and more accessible mix.Experimental Section. We used the following surfactants: sodium dodecylsulfate (DSNa), sodium dodecylbenzenesulfonate, Tween-20, Tween-80, Triton X-100, Bridge-35, and cetylpyridinium chloride. In the initial solutions, the surfactant fraction was ω = 0.5 wt%. From these solutions, model solutions were prepared with weight fraction of the surfactant solutions equal to 0.005, 0.010, 0.015, 0.025, 0.035, 0.050, 0.075, 0.100, and 0.125 wt%. The surfactant concentration was the same in the blank solutions (without zinc). The calibration solutions for the range of optimal zinc concentrations (0.1, 0.3, 0.5, 0.7, and 1.0 mg/L) were obtained by diluting the interstate standard sample for composition of a zinc ion solution 0032:1998 (DSZU 2 022.63-9...

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Simultaneous Quantitative Determination of Manganese, Iron, Copper and Zinc by Atomic Absorption Spectroscopy in Tropical Cereals, Fruit and Legume Materials

Cited by 10 publications

References 7 publications

Application of modified sawdust for solid phase extraction, preconcentration and determination of trace lead in water samples

Application of modified sawdust for solid phase extraction, preconcentration and determination of trace lead in water samples

Potential of Sawdust as a Green and Economical Sorbent for Simultaneous Preconcentration of Trace Amounts of Cadmium, Cobalt, and Lead from Water, Biological, Food, and Herbal Samples

Increasing the sensitivity and accuracy of zinc determination in atomic absorption spectrometry

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