Solid phase extraction of trace copper in water samples via modified corn silk as a novel biosorbent with detection by flame atomic absorption spectrometry

Zhu, Xifang; Yu, Hongmei; Jia, Honglin; Wu, Qi-Zhen; Jian-zhen, Liu; Li, Xia

doi:10.1039/c3ay40416a

Cited by 23 publications

(8 citation statements)

References 29 publications

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“…1A-D). These micron size channels appear to be dominant features in CS morphology [14]. Nevertheless, on Fig.…”

Section: Sem -Edx Characterization Of Cs Before and After Pb 2+ Adsormentioning

confidence: 96%

“…The usage of a corn silk in traditional medicine to treat many diseases is known [10][11][12], but despite its medicinal properties it is still not used in pharmaceutical industry and it is treated as waste material. Corn silk (CS) consists of numerous chemical compounds such as steroids, proteins, volatile oils and polyphenols [13,14] with a large number of functional groups (hydroxyl, carbonyl and carboxyl) on the surface, making it favorable for the metal adsorption. However, there is no data about lead or any other heavy metal removal by the raw CS.…”

Section: Introductionmentioning

confidence: 99%

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Removal of Pb2+ ions by raw corn silk (Zea mays L.) as a novel biosorbent

Petrović

Šoštarić

Stojanović

et al. 2016

Journal of the Taiwan Institute of Chemical Engineers

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“…1A-D). These micron size channels appear to be dominant features in CS morphology [14]. Nevertheless, on Fig.…”

Section: Sem -Edx Characterization Of Cs Before and After Pb 2+ Adsormentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Removal of Pb2+ ions by raw corn silk (Zea mays L.) as a novel biosorbent

Petrović

Šoštarić

Stojanović

et al. 2016

Journal of the Taiwan Institute of Chemical Engineers

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“…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%

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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“…These strategies not only improve analyte detectability, but also are relevant for removing matrix components that may induce inaccurate measurements [14]. Several biosorbents have been used as a substrate for dissolved Cu separation and preconcentration, such as banana peel [15,16], corn silk [17], olive pomace [18], food waste biomass [19], peat [20], pinion shell [21], soybean hull [22],among others. They have been considered reliable and environmental-friendly alternatives to the aforementioned commercially available synthetic sorbents [23].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of calcium alginate microparticles for copper preconcentration prior to F AAS measurements in fresh water

Colombo¹,

Porto²,

Carvalho³

et al. 2019

Br J Anal Chem

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Graphical AbstractCu preconcentration for F AAS -Calcium alginate microparticles were used for the preconcentration of copper for F AAS analysis of fresh waters A method for separation and preconcentration of Cu 2+ from fresh waters prior to flame atomic absorption spectrometry (FAAS) measurements, using calcium alginate (CA) microparticles, is proposed. Off-line analytes preconcentration was achieved using a flow-injection system incorporating a column containing CA (< 180 μm; 300 mg). The preconcentration procedure consisted of 50 mL sample or standard (at pH = 6) loading at 2.0 mL min -1 followed by analyte elution with 3 mL of HCl 1 mol L -1 . In these conditions, the enrichment factor was 17 times. The calibration curves were built ranging from 5 to 50 µg L -1 Cu 2+ . The procedure was applied for the analysis of fresh water sample spiked with 10 µg L -1 Cu 2+ , resulting in a recovery higher than 94%. Additionally, inter-column reproducibility (RSD < 3,5%; n = 5 columns) and the limit of detection of 0.8 µg L -1 were considered appropriate by taking into the maximum permitted Cu levels by the Brazilian National Environment Council (CONAMA) of 9 µg L -1 (fresh water, Class 1). The proposed approach using CA columns is a reliable and lower cost alternative for single-stage Cu preconcentration prior to F AAS measurements and can be recommended for the analysis of river fresh waters. CA column re-usability was confirmed up to 100 adsorption-desorption cycles.

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Solid phase extraction of trace copper in water samples via modified corn silk as a novel biosorbent with detection by flame atomic absorption spectrometry

Cited by 23 publications

References 29 publications

Removal of Pb2+ ions by raw corn silk (Zea mays L.) as a novel biosorbent

Removal of Pb2+ ions by raw corn silk (Zea mays L.) as a novel biosorbent

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

Evaluation of calcium alginate microparticles for copper preconcentration prior to F AAS measurements in fresh water

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