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Related Experiment Video

Updated: May 8, 2026

UV-Vis Spectroscopic Characterization of Nanomaterials in Aqueous Media

UV-Vis Spectroscopic Characterization of Nanomaterials in Aqueous Media

Published on: October 25, 2021

Comparison between two different nanoparticle size spectrometers.

F Belosi¹, S Ferrari, V Poluzzi

¹Institute of Atmospheric Sciences and Climate (ISAC)-CNR, Bologna, Italy. fbelosi@isac.cnr.it

Journal of the Air & Waste Management Association (1995)

|September 10, 2013

Summary

This summary is machine-generated.

Differential mobility particle sizers (DMPS) and fast mobility particle sizers (FMPS) show different ultrafine particle concentrations and size distributions. Establishing standardized working protocols is crucial for accurate air quality measurements.

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Published on: June 5, 2019

Area of Science:

Environmental Science
Atmospheric Science
Nanotechnology

Background:

Ultrafine particles (UFPs) are linked to increased mortality, necessitating accurate measurement of both mass and number concentrations.
Air quality monitoring relies on instruments like differential mobility particle sizers (DMPS) and fast mobility particle sizers (FMPS) for UFP characterization.

Purpose of the Study:

To compare the performance of a commercial DMPS and an FMPS in determining ultrafine particle size distributions.
To evaluate the agreement between DMPS and FMPS measurements for both atmospheric and laboratory-generated aerosols.
To highlight the need for standardized protocols (ISO 15900) for air quality measurements using these instruments.

Main Methods:

Utilized a commercial DMPS (Grimm Aerosol Technik) and an FMPS (TSI, model 3091) to measure particle size distributions.
Conducted comparisons using atmospheric aerosols and laboratory-generated aerosols (nebulized Milli-Q water and Fe2O3 suspension).
Analyzed particle number concentrations and size distributions across different aerosol types and size ranges.

Main Results:

The DMPS generally reported higher particle number concentrations than the FMPS, particularly for atmospheric aerosols.
The FMPS consistently showed a small peak around 10 nm, which was absent in the M-DMPS measurements.
Agreement in particle number concentration between DMPS and FMPS was better within specific ranges: 25-116 nm for atmospheric aerosols and 10-65 nm for laboratory aerosols.

Conclusions:

Significant differences in total particle number concentrations and size distributions were observed between DMPS and FMPS for both aerosol types.
The findings underscore the importance of considering particle number concentration, not just mass, for epidemiological studies.
There is an urgent need to develop and implement standardized working protocols compliant with ISO 15900 for reliable air quality measurements.