Combination of cloud point extraction with single particle inductively coupled plasma mass spectrometry to characterize silver nanoparticles in soil leachates

Torrent, Laura; Laborda, Francisco; Marguí, Eva; Hidalgo, Manuela; Iglesías, Mònica

doi:10.1007/s00216-019-01914-y

Cited by 25 publications

(23 citation statements)

References 56 publications

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“…However, the median diameters calculated using the transport efficiency obtained by the particle frequency method were far from the nominal ones, while the particle size method reported accurate diameters. Similar results have been previously reported by other authors 41 . Liu et al investigated both transport efficiency calibration methods by using a NIST reference material (RM 8013), coming to the conclusion that the particle size method is more robust and yields accurate results 42 .…”

Section: Resultssupporting

confidence: 93%

A Novel Strategy for the Detection and Quantification of Nanoplastics by Single Particle Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

et al. 2020

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A method for the detection and quantification of nanoplastics (NPTs) at environmentally relevant concentrations was developed. It is based on conjugating nanoplastics with functionalized metal (Au)-containing nanoparticles (NPs), thus making them detectable by highly sensitive inductively coupled plasma mass spectrometry (ICP-MS) operated in single particle (SP) mode. The selectivity of the method was achieved by the coupling of negatively charged carboxylate groups present at the surface of nanoplastics with a positively charged gelatin attached to the custom-synthesized AuNPs. The adsorbed Au produced a SP-ICP-MS signal allowing the counting of individual nanoplastic particles, and hence their accurate quantification (< 5% error). Polystyrene (PS) particle models with controlled surface functionalization mimicking the nanoplastics formed during natural degradation of plastic debris were used for the method development. The nanoplastic number concentration quantification limit was calculated at 8.4 x 10 5 NPTs L-1 and the calibration graph was linear up to 3.5 x 10 8 NPTs L-1. The method was applied to the analysis of nanoplastics of up to 1 µm in drinking, tap and river water. The minimum detectable and quantifiable size depended on the degree of functionalization and the surface available for labeling. For a fully functionalized nanoplastic, the lower size detectable by this strategy is reported as 135 nm. In this study, authors use the recommendation for the definition of nanoplastics as plastic particles with sizes ranging between 1 nm and 1 µm, although it has not been accepted by a dedicated organization.

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Section: Resultssupporting

confidence: 93%

A Novel Strategy for the Detection and Quantification of Nanoplastics by Single Particle Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

et al. 2020

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“…The discrimination between the continuous and noisy signals of the dissolved silver and AgNP signals are clearly better when the concentration of ionic silver decreases. This fact has previously been observed in a study of AgNP size and particle number concentration determination in soil aqueous leachates, carried out by Torrent et al [ 62 ]. In that work, the authors proposed a cloud point extraction methodology to separate Ag + and AgNPs.…”

Section: Discussionsupporting

confidence: 69%

“…SP-ICPMS data treatment was carried out using an in-lab Microsoft Excel spreadsheet. The separation of the signal corresponding to the AgNPs from the Ag + was performed by employing the iterative algorithm based on 5 times the standard deviation, plus the mean of all data points, obtained from the analysis [ 62 ]. In order to transfer the particle intensity to particle mass, the nebulization efficiency was calculated using the particle frequency method [ 63 ].…”

Section: Methodsmentioning

confidence: 99%

Silver Nanoparticles and Ionic Silver Separation Using a Cation-Exchange Resin. Variables Affecting Their Separation and Improvements of AgNP Characterization by SP-ICPMS

Iglesías

Torrent

2021

Nanomaterials

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Silver nanoparticles (AgNPs) are frequently found in everyday products and, as a consequence, their release into the environment cannot be avoided. Once in aquatic systems, AgNPs interact with natural constituents and undergo different transformation processes. Therefore, it is important to characterize and quantify AgNPs in environmental waters in order to understand their behavior, their transformation, and their associated toxicological risks. However, the coexistence of ionic silver (Ag+) with AgNPs in aquatic systems is one of the greatest challenges for the determination of nanosilver. Ion-exchange resins can be used to separate Ag+ from AgNPs, taking advantage of the different charges of the species. In this work, Dowex 50W-X8 was used to separate Ag+ and AgNPs in order to easily determine AgNP concentrations using inductively coupled plasma optical emission spectroscopy. The separation methodology was successfully applied to river water samples with different ratios of Ag+ and AgNPs. However, the methodology is not useful for wastewater samples. The described methodology also demonstrated an improvement in the determination of the particle size of AgNPs present in river waters by single particle inductively coupled plasma mass spectrometry when a significant amount of Ag+is also present.

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“…The use of silver nanoparticles (AgNPs) as antibacterial agents in the industry has resulted in an increase in their prevalence in the environment [105]. AgNPs were exclusively extracted from biological water tests without affecting their shapes and sizes by MSE with Triton X-114.…”

Section: Researchers In Chemistry Have Difficulty Determiningmentioning

confidence: 99%

The Fundamentals and Recent Applications of Micellar System Extraction for Nanoparticles and Bioactive Molecules: A Review

Azooz¹,

Ridha²,

Abdulridha³

2021

Nano BioMed ENG

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The basics and uses of the micellar system extraction technique (MSE) for extracting and preconcentrating nanoparticles and bioactive compounds (medicines and vitamins) are covered in this review. Hence, the influential factors of the MSE and applications are offered. The MSE, like any separation process, extracts the analytes in a small phase from the solution to improve analysis quality and remove sample background interference. The MSE has several advantages over other preconcentration and separation methods, such as speed, cheapness, security, selectivity, and safety. The use of toxic organic solvents is reduced or ignored, and the process is economical and environmentally friendly. In the latest works of literature, three different procedures use to extract nanomaterials. So bioactive molecules were separated by two methods with MSE, and this review also provided newly-developed MSE.

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Combination of cloud point extraction with single particle inductively coupled plasma mass spectrometry to characterize silver nanoparticles in soil leachates

Cited by 25 publications

References 56 publications

A Novel Strategy for the Detection and Quantification of Nanoplastics by Single Particle Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

A Novel Strategy for the Detection and Quantification of Nanoplastics by Single Particle Inductively Coupled Plasma Mass Spectrometry (ICP-MS)

Silver Nanoparticles and Ionic Silver Separation Using a Cation-Exchange Resin. Variables Affecting Their Separation and Improvements of AgNP Characterization by SP-ICPMS

The Fundamentals and Recent Applications of Micellar System Extraction for Nanoparticles and Bioactive Molecules: A Review

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