An indoor-air study used Raman spectroscopy to quantify small suspended particles in apartments and car cabins, with blank and recovery corrections.
Source details
Nadiia Yakovenko, Lucía Pérez-Serrano, Théo Segur, Oskar Hagelskjaer, Henar Margenat, Gaël Le Roux, Jeroen E. Sonke. PLOS ONE. 2025.
DOI: 10.1371/journal.pone.0328011
Findings
An indoor-air study used Raman spectroscopy to quantify small suspended particles in apartments and car cabins, with blank and recovery corrections.
- 528 particles/m³ median in apartments; Seven samples from three French apartments; blank/recovery corrected, area extrapolated.
- 2,238 particles/m³ median in car cabins; Five samples from two car cabins; blank/recovery corrected, area extrapolated.
- 1-28 µm observed apartment particle sizes; Raman identified particles from residential air samples.
Methods and scope
Active air sampling onto filters; Raman identification on a small central filter area; size/polymer-specific blank subtraction, recovery correction and extrapolation to filter area and sampled air volume.
What this source can support
Direct evidence about the measured indoor-air conditions and small-particle analytical window.
Small convenience sample; filter-area extrapolation and recovery correction add uncertainty. Recovery was tested with larger reference beads than many observed particles. Recovery estimates are inconsistently presented between Methods and Results. Car versus apartment difference was not statistically significant. Model-derived nanoplastic and inhaled-dose extrapolations are excluded here.
Related evidence
Reported values and source locations
| Reported value | Measurement basis | Conditions and size context | Original document location |
|---|---|---|---|
| 528 particles/m³ median in apartments | median; reported IQR 288-2487 particles/m³ | Seven samples from three French apartments; blank/recovery corrected, area extrapolated Observed apartment particles 1-28 µm, PDF p. 8 | PDF p. 7 Indoor MP concentrations |
| 2,238 particles/m³ median in car cabins | median; reported IQR 1515-2245 particles/m³ | Five samples from two car cabins; blank/recovery corrected, area extrapolated Observed car particles 1-15 µm, PDF p. 8 | PDF p. 7 Indoor MP concentrations |
| 1-28 µm observed apartment particle sizes | observed size range, not complete environmental size distribution | Raman identified particles from residential air samples 1-28 µm | PDF p. 8 Indoor MP morphological characteristics |
Source provenance
Primary PDF SHA-256: 850d35272369816328e323e65b209df4d7c6d6faf91156f55189d4ae4df5dfac
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