Table 5

Relative levels of HPHC and particulate matter in secondhand emissions from HnB products (ratio HnB:reference cigarette)

Ruprecht et al 33 2017Mitova et al 34 2016Forster et al 36 2018b
AffiliationNational Cancer Institute, Milan, ItalyPMIBAT
HnBIQOSIQOSGlo
Reference cigaretteConventional cigaretteMarlboro GoldLucky Strike Regular
Setting‘A sitting room’ (ACH=1.5)‘Residential’
(ACH=1.2)
‘Home’
(ACH=1.2)
Secondhand emissions’ markers
 370 nm UV BC (µg/m3)0.7%–0.8%
 PM>0.3 (particles/cm3)2.8%–7.3%
 PMnm (particles/cm3)22.0%–24.0%
 PM 1 (µg/m3)0.9%–1.0%HnB < background
 PM 2.5 (µg/m3)1.3%–1.5%Non-detectableHnB < background
 PM 10 (µg/m3)1.5%–1.7%HnB < background
 Ultraviolet particulate matterNon-detectable
 Fluorescent particulate matterNon-detectable
 SolanesolNon-detectable
 3-EthenylpyridineNon-detectableNon-detectable
HPHC
 1,3-ButadieneNon-detectableNon-detectable
 Acetaldehyde (µg/m3)5.0%–5.9%6.0%2.2%
 Acrolein (µg/m3)1.8%–2.3%Non-detectableNon-detectable
 AcrylonitrileNon-detectableNon-detectable
 Benzene1.7%HnB = background
 Carbon monoxide3.8%Non-detectable
 CrotonaldehydeNon-detectableNon-detectable
 Formaldehyde (µg/m3)6.9%–7.1%7.6%10.2%
 IsopreneHnB < backgroundHnB < background
 TolueneHnB < background3.7%
 Nicotine6.2%HnB < background
 Nitrogen oxidesHnB < backgroundHnB < background
 Nitrogen oxideHnB < backgroundHnB < background
  • ACH, air changes per hour (ventilation rate of an indoor space defined as air volume added/removed from the space in  1  hour   divided by the space volume); BAT, British American Tobacco; HnB,  heat-not-burn tobacco product;  HPHC,   harmful and potentially harmful compounds;   –, not measured; PM > 0.3, particulate matter larger than 0.3 µm; PM nm, particulate matter in size range of  10–1000   nm; PMI, Philip Morris International; UV BC, ultraviolet black carbon.