Colorimetric-solid phase extraction method for trace level determination of arsenite in water

Bradley, Melissa M.; Siperko, Lorraine M.; Porter, Marc D.

doi:10.1016/j.talanta.2011.08.004

Cited by 19 publications

(8 citation statements)

References 60 publications

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“…It would be necessary to develop a simple and single-step method for the determination of trace mercury with high sensitivity and selectivity. In recent years, a novel colorimetric determination method named colorimetric solid phase extraction (C-SPE) [30][31][32][33] has been developed. It complexes and concentrates analytes on a reagent-impregnated SPE membrane, and the resulting color change is then measured directly on the surface by a hand-held diffuse reflection spectra (DRS).…”

Section: +mentioning

confidence: 99%

Naked-eye sensor for rapid determination of mercury ion

Liu

Yan

et al. 2013

Talanta

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Section: +mentioning

confidence: 99%

Naked-eye sensor for rapid determination of mercury ion

Liu

Yan

et al. 2013

Talanta

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“…In the first approach, commercial SPE or functionalized material developed for selective enrichment, is packed in a cartridge and the enriched eluent is analysed using colorimetric indicator 14 , 15 . The second approach combines selective enrichment and colorimetry in a single step by impregnating an analyte specific indicator with solid-phase of the SPE cartridge for metal detection 16 , 17 . This method eliminates the requirement of the elution step but it requires a complex reagent impregnation process.…”

Section: Introductionmentioning

confidence: 99%

Adsorptive colorimetric determination of chromium(VI) ions at ultratrace levels using amine functionalized mesoporous silica

Ghosh

Gopalakrishnan

Renganathan

et al. 2022

Sci Rep

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There is an urgent need for a rapid, affordable and sensitive analytical method for periodic monitoring of heavy metals in water bodies. Herein, we report for the first time a versatile method for ultratrace level metal detection based on colorimetric sensing. The method integrates preconcentration using a nanomaterial with a colorimetric assay performed directly on the metal-enriched nanomaterial surface. This method circumvents the need for tedious sample pre-processing steps and the complex development of colorimetric probes, thereby reducing the complexity of the analytical procedure. The efficacy of the proposed method was demonstrated for chromium(VI) ions detection in water samples. Amine functionalized mesoporous silica (AMS) obtained from a one-pot synthesis was utilized as a pre-concentration material. The structural and chemical analysis of AMS was conducted to confirm its physico-chemical properties. The pre-concentration conditions were optimized to maximise the colorimetric signal. AMS exhibited a discernible colour change from white to purple (visible to the naked eye) for trace Cr(VI) ions concentration as low as 0.5 μg L−1. This method shows high selectivity for Cr(VI) ions with no colorimetric signal from other metal ions. We believe our method of analysis has a high scope for de-centralized monitoring of organic/inorganic pollutants in resource-constrained settings.

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“…Several attempts involving molybdenum-loaded chelating resin, modied CdTe quantum dots, membrane lters (MFs) impregnated with chelating reagents or modied eld kits have been performed to develop an advanced on-site method for arsenic. [8][9][10][11][12][13][14] However, a more advanced method for on-site analysis of arsenic in groundwater to satisfy simplicity, costeffectiveness, sensitivity, selectivity, safety and speciation accuracy is required. Solid phase extraction of colored species on an MF has been applied to visual colorimetry of phosphate nickel, antimony(V), chromium(VI), manganese, formaldehyde and urinary protein.…”

Section: Introductionmentioning

confidence: 99%