Themed collection JAAS HOT Articles 2022

LIBS in agricultural product sample preparation methods and agricultural product quality and safety analysis applications are reviewed. The advantages as well as challenges of LIBS in agricultural applications are discussed.

Hand-held XRF is described from a tutorial viewpoint suitable for users without extensive training in XRF methodology in order to raise awareness of issues in using the technique and improve the interpretation of hand-held XRF measurement results.

In this study, we examine the possibility of detecting PTFE microparticles by ICP-qMS equipped with O₂ dynamic reaction cell (DRC) and operated in single-particle mode.

We observed Doppler-free fluorescence spectra using ablation plumes. From the lineshape analyses the detailed collisional process in the ablation plume was revealed and the isotopic analysis for nuclides with small isotope shifts was demonstrated.

A new approach for monitoring Sr isotopes via HR CS GFMAS is described.

Component prediction models for laser induced breakdown spectroscopy data of ChemCam are created using a hybrid variable selection strategy.

CE was hyphenated to MC-ICP-MS in a glove box to measure isotope ratios of actinides and lanthanides in spent nuclear fuel.

The direct conversion between HEROS-XES and XANES edge position (E0) without need of measuring absorption spectra.

A natural ilmenite (PZH12-09) is homogeneous and thus suitable for use as a reference material for in situ microanalysis. An EPMA method was developed to determine the trace elements of ilmenite, with high precision and low detection limits.

Rapid recognition and quantitative analysis of niobium minerals by multi-stage filtration techniques based on SEM-EDS.

In this work, DC glow discharge atomic emission spectrometry coupled with cold vapor generation was used to achieve the ultra-sensitive analysis of mercury, with good anti-interference ability.

The influences of the focusing geometry and axial focusing position of the second laser pulse on orthogonal double-pulse LIBS were investigated.

The problem of natural lanthanide correlation in ores combined with strong line overlapping is addressed via a DoE based on LHS and multivariate regression. The comparison of the analytical performance of high- and low-resolution spectrometers is presented.

Objective: medium and low alloy steel have good mechanical properties and are widely used in the manufacture of key parts such as high-speed rail, automobiles, and aircrafts.

Tianyu-Py pyrite is investigated as the natural reference material for in situ iron isotopic ratios microanalysis.

A quantification method combining transfer learning, a convolutional neural network and multitask regularization to improve prediction accuracy and model robustness on limited data.

A modified method for removing the strong background in FL-LIBS.

Laser-induced breakdown spectroscopy (LIBS) is expanded for rapid determination of key mineral species in copper ores.

Coupling HSI and μ-LIBS for elemental and mineralogical imaging in rocks. Elemental and mineral distribution with micrometric spatial resolution. μ-LIBS was expanded to a new field of molecular imaging.

A new quantitative analysis algorithm based on data extraction and representative data selection in the LIBS field to establish the prediction model with a small sample size is proposed.

Calibration datasets can be extended by using artificial neural networks to transform data collected on different LIBS systems. Hence, regression performance can be improved.

Fe isotopic measurements in low resolution mode, using Nu Sapphire CC-MC-ICP-MS.

A sensitive procedure was developed for trace Cr determination by ICP MS with a DDTC enhanced nebulized film dielectric barrier discharge (NFDBD) vapor generation sampling system.

The correlation between non-uniform gas flow patterns in large ablation cells and the resulting elemental fractionation is investigated and compared to two-volume ablation cells.

Accurate in situ analysis of beryllium (Be) is still a technical bottleneck in the fields of geoscience and materials science.

The principle and process of the PIC method.

We developed an artificial neural network method for characterising crucial physical plasma parameters (i.e., temperature, electron density) in a fast and precise manner that mitigates common issues arising in evaluation of LIBS spectra.

Glass beads with improved physical properties were obtained by high-frequency pulse laser fusion of sandstone samples, which improved the stability of the LIBS signal.

Evaluation of the IRMM-524A Fe metal as a primary reference material and natural samples of pyrite and ilmenite as secondary reference materials is presented for the Fe isotopic analysis using femtosecond LA-MC-ICP-MS.

Confocal micro-X-ray fluorescence spectroscopy can be performed with laboratory spectrometers for elemental imaging and quantification with 3D resolution.

Increased humidity causes terrible accuracy in laser-induced breakdown spectroscopy analysis of coal. The moisture interference was reduced using artificial neural networks (ANN) combined with random spectral attenuation in this study.

The present study demonstrates the analytical capability of AMS in clay matrices by the concurrent determination of the actinide nuclides ²³³U, ²³⁷Np, ²⁴⁴Pu, ²⁴³Am, and ²⁴⁸Cm down to ≈0.07 fg per sample.

3D LIBS analysis provides insight into interaction of molten salts with nuclear grade graphites, including fluorine and other low-Z elements, through principal component and emission correlation analysis, as well as emission mapping/profiling.

A new method based on conjoint liquid chromatography with post-column ID-ICP-MS detection was developed for the speciation of Cu in human serum. Cu ceruloplasmin (Cu-Cp) is suggested as a potential biomarker in cancer diagnosis.

In situ magnesium isotope compositions of carbonates play an important role in tracing geological and biological processes.

This work establishes a hyphenated methodology coupling HPLC with ICP-MS for the determination of platinum chloride complexes as synthetic impurities of platinum-based drugs for the first time.

The factors influencing the signal noise and its contribution to the uncertainty of a single AgNP size in spICP-MS were investigated.

Combination of microdroplet generator and ICP-ToF-MS for nanoparticle sizing via on-line ID (on-line ID-MDG-sp-ICP-ToF-MS). ¹⁹⁴Pt/¹⁹⁵Pt ratio was used for sizing of the particles, while ¹⁸²W/¹⁸³W ratio used simultaneously for mass bias correction.

FLiBe has favorable properties for use in molten salt nuclear reactors, and constraints on the thermochemical properties of the salt rely on accurate and precise analysis of the Li/Be ratio.

ICP-MS/MS measurement with mass-shift mode using O₂/He–He collision gas can effectively suppress the interference of polyatomic ions from interfering elements (Pb, Hg, Tl, etc.) in analysis of ultra-trace level ²⁴¹Am in environmental samples.

The reactivity of selenoprotein P (a serum selenoprotein containing 10 selenocysteine (SeCys), 17 cysteine (Cys) and 14 histidine (His) residues) with two metallodrugs (auranofin and cisplatin) was investigated.

We have developed methods to accurately determine the platinum isotope compositions of iron meteorites. These can be used to investigate processes of planetary formation and evolution, including accretion and core crystallisation.

Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) was applied for the determination of Br and I in hair strands of human individuals under treatment with synthetic thyroid hormones.

The spatial resolution of micro-XRF can be improved by oversampling and image restoration techniques.

By combining a convolutional neural network (CNN) and laser induced breakdown spectroscopy, this study reports a multi-task analysis method to simultaneously solve the problems of lithological recognition and the quantitative analysis of seven major chemical elements in rock analysis.

Portable laser ablation is tested for Pb isotope analysis of silver, yielding results comparable to bulk analyses. This low impact method removes the need for invasive sampling, opening the way for analysis of archaeological silver worldwide.

This work will describe a system to quantify ultra-low-level tritium concentrations in ∼100 mL water samples. Tritium decays into ³He, thus we can take advantage of high sensitivity noble gas mass spectrometry.

The neutron flux monitor is a critical part of the process of ⁴⁰Ar/³⁹Ar dating. We report a new protocol to prepare a neutron flux monitor from the sanidine contained within obsidian, a rock which has undergone rapid eruption and cooling on the surface.

In this study, we developed a method for measuring Sm–Nd isotopic ratios in samples with low Nd contents (<100 μg g⁻¹) by LA-MC-ICP-MS.

In this study, a foamed nickel trap (NT) was first utilized as a gas-phase enrichment (GPE) material to preconcentrate Cd under ambient temperature and then release it by heating.

A new laser ablation technique combined with mass spectrometry measurements was applied for trace elements and radiogenic isotopic analyses of high-density fluid (HDF) microinclusion-bearing diamonds.