Determination of Trace Silver in Water Samples by Online Column Preconcentration Flame Atomic Absorption Spectrometry Using Termite Digestion Product

Bianchin, Joyce Nunes; Martendal, Edmar; Carasek, Eduardo

doi:10.1155/2011/839365

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…Taking into account the PEC for AgNPs to be able to implement our average SERS methods, a pre-concentration step must be integrated. The utilization of solid phase extraction [ 52 ] or cloud point extraction [ 53 ] has been reported for this purpose; however, these were coupled to “non-portable” analytical methods: Flame atomic absorption spectrometry and inductively coupled plasma mass spectrometry, respectively.…”

Section: Discussionmentioning

confidence: 99%

Detection of Silver Nanoparticles in Seawater Using Surface-Enhanced Raman Scattering

et al. 2021

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Nanomaterials significantly contribute to the development of new solutions to improve consumer products properties. Silver nanoparticles (AgNPs) are one of the most used, and as human exposure to such NPs increases, there is a growing need for analytical methods to identify and quantify nanoparticles present in the environment. Here we designed a detection strategy for AgNPs in seawater using surface-enhanced Raman Scattering (SERS). Three commercial AgNPs coated with polyvinylpyrrolidone (PVP) were used to determine the relative impact of size (PVP-15nmAgNPs and PVP-100nmAgNPs) and aggregation degree (predefined Ag aggregates, PVP-50–80nmAgNPs) on the SERS-based detection method. The study of colloidal stability and dissolution of selected AgNPs into seawater was carried out by dynamic light scattering and UV-vis spectroscopy. We showed that PVP-15nmAgNPs and PVP-100nmAgNPs remained colloidally stable, while PVP-50–80nmAgNPs formed bigger aggregates. We demonstrated that the SERS-based method developed here have the capacity to detect and quantify single and aggregates of AgNPs in seawater. The size had almost no effect on the detection limit (2.15 ± 1.22 mg/L for PVP-15nmAgNPs vs. 1.51 ± 0.71 mg/L for PVP-100nmAgNPs), while aggregation caused an increase of 2.9-fold (6.08 ± 1.21 mg/L). Our results demonstrate the importance of understanding NPs transformation in seawater since this can influence the detection method performance.

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Section: Discussionmentioning

confidence: 99%

Detection of Silver Nanoparticles in Seawater Using Surface-Enhanced Raman Scattering

et al. 2021

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“… 1 , 14 This method is applicable when the sample is in solution or readily solubilized; also, the technique is remarkably free from external interferences. 41 - 44 However, FAAS is characterized by low sensitivity, is highly expensive and requires extra abilities for the operator. 45 Consequently, the accessibility of FAAS methods is limited.…”

Section: Analysis Methodsmentioning

confidence: 99%

Essential Guide of Analysis Methods Applied to Silver Complexes with Antibacterial Quinolones

Rusu¹,

Hancu²,

Imre³

2018

Adv Pharm Bull

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To describe the chemical structure and characterize physico-chemical properties of organometallic complexes it is necessary to use a complex set of analysis methods. Thus, this review has been compiled as a relevant guide which includes the most commonly used methods of analysis in the study of silver complexes with antibacterial quinolones, compounds with promising biological potential. This selection of analysis methods puts on balance the obtained data and the accessibility of the experimental approach. The steps to follow in order to obtain reliable structural information about organometallic complexes of silver, particularly the silver complexes of antibacterial quinolones, are established and presented in the review.

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Sensitive Ion‐Flotation Separation of Ag(I) Traces Using 2‐(2‐Methoxyphenyl)benzimidazole before Flame Atomic Absorption Spectrometric Determination in Water

Tavallali

Lalehparvar

Nekoei

et al. 2012

CLEAN Soil Air Water

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A sensitive, reliable, and environmentally friendly method for simple separation and preconcentration of Ag(I) traces in aqueous samples is presented prior to their flame atomic absorption spectrometric determinations. At pH 7.0, Ag(I) was separated with 2‐(2‐methoxyphenyl)benzimidazole (MPBI) as a new complexing agent and floated after adding sodium dodecyl sulfate (SDS) as a foaming reagent. The floated layer was then dissolved in proper amount of concentrated nitric acid in methanol and introduced to the flame atomic absorption spectrometer (FAAS). The effects of pH, concentration of MPBI, type and amount of surfactant as the floating agent, type and amount of eluting agent, and influence of foreign ions on the recovery of the analyte ion were investigated. Also, using a nonlinear curve fitting method, the formation constant of 1.62 × 106 was obtained for Ag(I)–MPBI complex. The analytical curve was linear in the range of 1.8 × 10−7–1.7 × 10−6 mol/L for determination of Ag(I). The relative standard deviation (RSD; N = 10) corresponding to 0.7 × 10−6 mol/L of Ag(I), the limit of detection (10 blanks), and the enrichment factor were obtained as 1.7%, 2.9 × 10−8 mol/L, and 43.0, respectively. The proposed procedure was then applied successfully for determination of silver ions in different water samples.

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Determination of Trace Silver in Water Samples by Online Column Preconcentration Flame Atomic Absorption Spectrometry Using Termite Digestion Product

Cited by 6 publications

References 30 publications

Detection of Silver Nanoparticles in Seawater Using Surface-Enhanced Raman Scattering

Detection of Silver Nanoparticles in Seawater Using Surface-Enhanced Raman Scattering

Essential Guide of Analysis Methods Applied to Silver Complexes with Antibacterial Quinolones

Sensitive Ion‐Flotation Separation of Ag(I) Traces Using 2‐(2‐Methoxyphenyl)benzimidazole before Flame Atomic Absorption Spectrometric Determination in Water

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