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Third-hand smoking: indoor measurements of concentration and sizes of cigarette smoke particles after resuspension
  1. M H Becquemin1,2,3,
  2. J F Bertholon1,2,
  3. M Bentayeb2,4,
  4. M Attoui2,4,
  5. D Ledur5,
  6. F Roy1,
  7. M Roy1,
  8. I Annesi-Maesano2,
  9. B Dautzenberg1,2
  1. 1Assistance Publique Hôpitaux de Paris, Paris, LGDA, France
  2. 2UPMC,Universités Paris and Créteil, France
  3. 3ER10UPMC, France
  4. 4EPAR, UMR-S707 INSERM, France
  5. 5Société Ecomesure, France
  1. Correspondence to Professor J F Bertholon, UPMC, 27 rue de Chaligny, Paris 75012, France; jean-francois.bertholon{at}upmc.fr

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In a previous study1 of ‘secondhand’ cigarette smoke, we showed that 75% of the particles added to indoor air were of ultrafine sizes and had a half-life in air of 18 minutes at 25°C. These particles after their deposition on household surfaces could be later put back in suspension and constitute a toxic ‘thirdhand’ smoke2 which has not, as yet, been documented through quantitative data. Consequently, we undertook direct measurements of the concentration and sizes of smoke particles after their …

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