Evaluation of the Uncertainty in the Measurement of Nanoparticle Size and Concentration by Single Particle Inductively Coupled Plasma Mass Spectrometry Technique
Single-particle inductively coupled plasma-mass spectrometry (sp-ICP-MS) is a powerful technique that enables the simultaneous measurement of nanoparticle size and the quantification of metal-containing nanoparticles at real concentrations. These measurements are critical for understanding the potential uses of nanoparticles in various fields. However, sp-ICP-MS is not yet considered a mature methodology. Standardization is necessary, particularly in assessing the reliability of size distribution measurements. This study aims to standardize sp-ICP-MS by assessing the reliability of size distribution measurements for polyvinylpyrrolidone-coated silver nanoparticles and quantifying the input quantities contributing to uncertainties. The uncertainties in calibration, repeatability, and trueness were evaluated based on the thresholds defined by International Organization for Standardization (ISO) standards. Calibration uncertainty was found to be 8.1%, while repeatability was 0.04%, both within the stipulated range of less than 10%. The expanded uncertainty was calculated to be 17%, with a 95% coverage probability for the reference material. Limits of detection (LOD) and quantification (LOQ) for dissolved concentration, particles per mL, and size were determined to be 0.37 µg L–1, 97.5 particles mL–1, and 24.6 nm, respectively. These results demonstrate that the reliability and repeatability of sp-ICP-MS meet ISO-defined thresholds, suggesting that with further standardization, sp-ICP-MS could become a reliable methodology for nanoparticle analysis.
Citação
@online{geraldes,_adriana2025,
author = {Geraldes, Adriana, N. and Hortellani, Marcos, A. and M.
Rostelato, Maria Elisa, C. and S. Sarkis, Jorge, E.},
title = {Evaluation of the Uncertainty in the Measurement of
Nanoparticle Size and Concentration by Single Particle Inductively
Coupled Plasma Mass Spectrometry Technique},
date = {2025-01-01},
doi = {10.21577/0103-5053.20250011},
langid = {pt-BR},
abstract = {Single-particle inductively coupled plasma-mass
spectrometry (sp-ICP-MS) is a powerful technique that enables the
simultaneous measurement of nanoparticle size and the quantification
of metal-containing nanoparticles at real concentrations. These
measurements are critical for understanding the potential uses of
nanoparticles in various fields. However, sp-ICP-MS is not yet
considered a mature methodology. Standardization is necessary,
particularly in assessing the reliability of size distribution
measurements. This study aims to standardize sp-ICP-MS by assessing
the reliability of size distribution measurements for
polyvinylpyrrolidone-coated silver nanoparticles and quantifying the
input quantities contributing to uncertainties. The uncertainties in
calibration, repeatability, and trueness were evaluated based on the
thresholds defined by International Organization for Standardization
(ISO) standards. Calibration uncertainty was found to be 8.1\%,
while repeatability was 0.04\%, both within the stipulated range of
less than 10\%. The expanded uncertainty was calculated to be 17\%,
with a 95\% coverage probability for the reference material. Limits
of detection (LOD) and quantification (LOQ) for dissolved
concentration, particles per mL, and size were determined to be 0.37
µg L–1, 97.5 particles mL–1, and 24.6 nm, respectively. These
results demonstrate that the reliability and repeatability of
sp-ICP-MS meet ISO-defined thresholds, suggesting that with further
standardization, sp-ICP-MS could become a reliable methodology for
nanoparticle analysis.}
}