A coprecipitation procedure for the determination of some metals in food and environmental samples by flame atomic absorption spectroscopy

Özdemir, Coşkun; Saçmacı, Şerife; Kartal, Şenol

doi:10.1039/c3ay40727f

Cited by 14 publications

(6 citation statements)

References 23 publications

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“…The LODs are listed in Table 5. As can be seen, for copper analysis based on the atomic spectroscopic method using SPE, the LOD of this work was at least one order of magnitude lower than that using the methods of Yalcınkaya et al, 31 Ghaedi et al 32 and Dai et al, 33 2-4 times lower than that by the methods of Özdemir et al, 34 Zhu et al, 35 Nomngongo et al, 36 and Rao et al, 37 and was comparable with other AAS methods, 38,39 showing the high sensitivity of the proposed method for copper ions. Also, the recoveries of copper ions from various real samples are satisfactory.…”

Section: Analysis Of Real Samplesmentioning

confidence: 56%

“…The recoveries ranged between 90 and 111% for Cu 2+ in the spiked environmental water samples and food samples, which indicated the good selectivity of the proposed method for the determination of trace Cu 2+ . The present method was compared with analytical methods previously published in the literature [31][32][33][34][35][36][37][38][39] for the analysis of copper ions in terms of LOD and recovery. The LODs are listed in Table 5.…”

Section: Analysis Of Real Samplesmentioning

confidence: 99%

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Solid-phase extraction based on polyethyleneimine-modified eggshell membrane coupled with FAAS for the selective determination of trace copper(ii) ions in environmental and food samples

Zou

Huang

2013

Anal. Methods

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Polyethyleneimine (PEI) can selectively capture trace-level free copper ions (Cu 2+ ), from which the true toxic effects of copper originate. Thus, PEI-functionalized eggshell membrane (ESM) may serve as a green, economical, easily available, and selective solid phase extraction (SPE) adsorbent material for Cu 2+ enrichment. In this paper, the potential of the PEI-functionalized ESM (PEI-ESM) as a biosorbent for the selective solid phase extraction and preconcentration of trace Cu 2+ in environmental water samples and food samples in combination with flame atomic absorption spectrometry (FAAS) was investigated. After modification, the dynamic uptake capacity of PEI-ESM increased by about 20-fold compared with ESM. Various factors affecting Cu 2+ extraction by SPE were investigated. Under the optimal conditions, Cu 2+ could be easily extracted by the PEI-ESM packed cartridge. The favorable limit of detection (LOD) for Cu(II) was 0.15 mg L À1 with an enrichment factor of 100, and the relative standard deviation (RSD) was 2.0% for 50 mg L À1 Cu(II) (n ¼ 11). The reproducibility among columns was satisfactory (RSD among the columns is less than 5%). Stability testing demonstrated that the PEI-ESM maintained over 92.0% recovery for Cu(II) even after a run of 45 adsorption and desorption cycles, showing its operational stability. The proposed method has been applied successfully to the analysis of copper in environmental water samples and food samples, which demonstrated that PEI-ESM could be an excellent SPE adsorbent for copper pretreatment and enrichment from real water samples and food samples.

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Section: Analysis Of Real Samplesmentioning

confidence: 56%

Section: Analysis Of Real Samplesmentioning

confidence: 99%

Solid-phase extraction based on polyethyleneimine-modified eggshell membrane coupled with FAAS for the selective determination of trace copper(ii) ions in environmental and food samples

Zou

Huang

2013

Anal. Methods

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“…Presently, a diverse array of analytical techniques exists for ultrasensitive detection (down to the fM level) of trace analytes. These encompass a variety of approaches, including spectroscopy-based methods, such as atomic absorption spectrometry (ppb to ppm range), inductively coupled plasma atomic emission spectrometry (ppb to ppm range), and inductively coupled plasma mass spectrometry (ppt to ppb range). − Additionally, electrochemical techniques, such as potentiometry employing ion-sensitive electrodes and stripping voltammetry (nM to pM range), are widely employed . Furthermore, X-ray-based methods like X-ray fluorescence (ppm to ppb range) are also valuable tools in this regard …”

Section: Introductionmentioning

confidence: 99%

Concentration Enrichment in a Dissolving Microdroplet: Accessing Sub-nanomolar Electroanalysis

Rana,

Nguyen,

Renault

et al. 2024

Anal. Chem.

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Droplet evaporation has previously been used as a concentration enrichment strategy; however, the measurement technique of choice requires quantification in rather large volumes. Electrochemistry has recently emerged as a method to robustly probe volumes even down to the attoliter (10 −18 L) level. We present a concentration enrichment strategy based on the dissolution of a microdroplet placed on the surface of a Au ultramicroelectrode (radius ∼ 6.25 μm). By precisely positioning a 1,2-dichloroethane microdroplet onto the ultramicroelectrode with a microinjector, we are able to track the droplet's behavior optically and electrochemically. Because the droplet spontaneously dissolves over time, given the relative solubility of 1,2-dichloroethane in the water continuous phase, the change in volume with time enriches the concentration of the redox probe (Cp 2 *(Fe) II ) in the droplet. We demonstrate robust electrochemical detection down to sub-nM (800 pM) concentrations of Cp 2 *(Fe) II . For this droplet, 800 pM constitutes only about 10 6 molecules. We extend the strategy in a single-blind study to determine unknown concentrations, emphasizing the promise of the new methodology. These results take voltammetric quantification easily to the sub-μM regime.

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“…In view of this harmful effect, it is very important to detect heavy metals in farm products. Conventional elemental analysis techniques, such as atomic absorption spectrometry (AAS) [1] , inductively coupled plasma-optical emission spectroscopy (ICP-OES) [2] , and inductively coupled plasma-mass spectroscopy (ICP-MS) [3] , have higher sensitivity and accuracy and better detect limit. But the above methods need complex preprocessing of samples and consume plenty of chemical reagents.…”

Section: Introductionmentioning

confidence: 99%

Nondestructive Determination of Cu Residue in Orange Peel by Laser Induced Breakdown Spectroscopy

Huang

Liu

et al. 2015

Plasma Sci. Technol.

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Laser induced breakdown spectroscopy (LIBS) is an emerging tool with rapid, nondestructive, green characteristics in qualitative or quantitative analyses of composition in materials. But LIBS has its shortcomings in detect limit and sensitivity. In this work, heavy metal Cu in Gannan Navel Orange, which is one of famous fruits from Jiangxi of China, was analyzed. In view of LIBS's limit, it is difficult to determinate heavy metals in natural fruits. In this work, nine orange samples were pretreated in 50-500 µg/mL Cu solution, respectively. Another one orange sample was chosen as a control group without any pollution treatment. Previous researchers observed that the content of heavy metals is much higher in peel than in pulp. So, the content in pulp can be reflected by detecting peel. The real concentrations of Cu in peels were acquired by atomic absorption spectrophotometer (AAS). A calibration model of Cu I 324.7 and Cu I 327.4 was constructed between LIBS intensity and AAS concentration by six samples. The correlation coefficient of the two models is also 0.95. All of the samples were used to verify the accuracy of the model. The results show that the relative error (RE) between predicted and real concentration is less than 6.5%, and Cu I 324.7 line has smaller RE than Cu I 327.4. The analysis demonstrated that different characteristic lines decided different accuracy. The results prove the feasibility of detecting heavy metals in fruits by LIBS. But the results are limited in treated samples. The next work will focus on direct analysis of heavy metals in natural fruits without any pretreatment. This work is helpful to explore the distribution of heavy metals between pulp and peel.

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A coprecipitation procedure for the determination of some metals in food and environmental samples by flame atomic absorption spectroscopy

Cited by 14 publications

References 23 publications

Solid-phase extraction based on polyethyleneimine-modified eggshell membrane coupled with FAAS for the selective determination of trace copper(ii) ions in environmental and food samples

Solid-phase extraction based on polyethyleneimine-modified eggshell membrane coupled with FAAS for the selective determination of trace copper(ii) ions in environmental and food samples

Concentration Enrichment in a Dissolving Microdroplet: Accessing Sub-nanomolar Electroanalysis

Nondestructive Determination of Cu Residue in Orange Peel by Laser Induced Breakdown Spectroscopy

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