Development of a hyperspectral imaging technique using LA-ICP-MS to show the spatial distribution of elements in soil cores

A laser ablation–inductively coupled plasma–mass spectrometry (LA–ICP–MS) based method is proposed for the quantitative determination of the spatial distribution of metal nanoparticles (NPs) supported on planar substrates. The surface is sampled using tailored ablation patterns and the data are used to define three-dimensional functions describing the spatial distribution of NPs. The volume integrals of such interpolated surfaces are calibrated to obtain the mass distribution of Ag NPs by correlation with the total mass of metal as determined by metal extraction and ICP–MS analysis. Once this mass calibration is carried out on a sacrificial sample, quantifications can be performed over multiple samples by a simple micro-destructive LA–ICP–MS analysis without requiring the extraction/dissolution of metal NPs. The proposed approach is here tested using a model sample consisting of a low-density polyethylene (LDPE) disk decorated with silver NPs, achieving high spatial resolution over cm2-sized samples and very high sensitivity. The developed method is accordingly a useful analytical tool for applications requiring both the total mass and the spatial distribution of metal NPs to be determined without damaging the sample surface (e.g., composite functional materials and NPs, decorated catalysts or electrodic materials).

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Spatial distribution of total polyphenols in multi-type of tea using near-infrared hyperspectral imaging

LWT ◽

10.1016/j.lwt.2021.111737 ◽

2021 ◽

pp. 111737

Author(s):

Yujie Wang ◽

Ying Liu ◽

Yuyu Chen ◽

Qingqing Cui ◽

Luqing Li ◽

...

Keyword(s):

Spatial Distribution ◽

Hyperspectral Imaging ◽

Near Infrared ◽

Total Polyphenols

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Evaluation of melon drying using hyperspectral imaging technique in the near infrared region

LWT ◽

10.1016/j.lwt.2021.111092 ◽

2021 ◽

Vol 143 ◽

pp. 111092

Author(s):

Jose Marcelino S. Netto ◽

Fernanda A. Honorato ◽

Patrícia M. Azoubel ◽

Louise E. Kurozawa ◽

Douglas F. Barbin

Keyword(s):

Hyperspectral Imaging ◽

Near Infrared ◽

Imaging Technique ◽

Infrared Region ◽

Near Infrared Region

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The potential of trace elements mapping in child’s natal tooth by laser ablation-ICPMS method

Journal of Environmental Health Science and Engineering ◽

10.1007/s40201-021-00611-2 ◽

2021 ◽

Author(s):

Aneta Olszewska ◽

Anetta Hanć

Keyword(s):

Trace Elements ◽

Spatial Distribution ◽

Quantitative Assessment ◽

Toxic Elements ◽

Tooth Enamel ◽

Perinatal Period ◽

Potentially Toxic Elements ◽

Metal Exposure ◽

Icp Ms ◽

Distribution Of Trace Elements

Abstract Purpose Tooth enamel might provide past chronological metabolic, nutritional status and trace metal exposure during development. Thus, the trace elements distribution embedded in tooth tissues represents an archive of the environmental conditions. The choice of biomarker is estimated as critical to the measurement of metal exposure. Natal teeth are defined as teeth being present at birth. Methods LA-ICP-MS provides a quantitative assessment of spatial distribution of trace elements in a natal tooth. The objective of the current study was to compare concentrations of building and other elements in a rare but reliable and valid biomarker - natal tooth. Results It have been reported presence of potentially toxic elements: Pb, Cu, Mn, Cd, Ni distributed in prenatally and perinatally formed enamel and dentine. Conclusions Analyses of deciduous enamel can provide answers into individuals’ earliest development, including critical pre- and perinatal period.

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