| Title |
iQOS: evidence of pyrolysis and release of a toxicant from plastic
|
|---|---|
| Published in |
Tobacco Control, March 2018
|
| DOI | 10.1136/tobaccocontrol-2017-054104 |
| Pubmed ID | |
| Authors |
Barbara Davis, Monique Williams, Prue Talbot |
| Abstract |
To evaluate performance of the I quit original smoking (iQOS) heat-not-burn system as a function of cleaning and puffing topography, investigate the validity of manufacturer's claims that this device does not burn tobacco and determine if the polymer-film filter is potentially harmful. iQOS performance was evaluated using five running conditions incorporating two different cleaning protocols. Heatsticks were visually and stereomicroscopically inspected preuse and postuse to determine the extent of tobacco plug charring (from pyrolysis) and polymer-film filter melting, and to elucidate the effects of cleaning on charring. Gas chromatography-mass spectrometry headspace analysis was conducted on unused polymer-film filters to determine if potentially toxic chemicals are emitted from the filter during heating. For all testing protocols, pressure drop decreased as puff number increased. Changes in testing protocols did not affect aerosol density. Charring due to pyrolysis (a form of organic matter thermochemical decomposition) was observed in the tobacco plug after use. When the manufacturer's cleaning instructions were followed, both charring of the tobacco plug and melting of the polymer-film filter increased. Headspace analysis of the polymer-film filter revealed the release of formaldehyde cyanohydrin at 90°C, which is well below the maximum temperature reached during normal usage. Device usage limitations may contribute to decreases in interpuff intervals, potentially increasing user's intake of nicotine and other harmful chemicals. This study found that the tobacco plug does char and that charring increases when the device is not cleaned between heatsticks. Release of formaldehyde cyanohydrin is a concern as it is highly toxic at very low concentrations. |
X Demographics
The data shown below were collected from the profiles of 54 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United Kingdom | 4 | 7% |
| United States | 3 | 6% |
| Russia | 2 | 4% |
| France | 2 | 4% |
| Japan | 2 | 4% |
| Canada | 1 | 2% |
| Spain | 1 | 2% |
| Argentina | 1 | 2% |
| Albania | 1 | 2% |
| Other | 7 | 13% |
| Unknown | 30 | 56% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 39 | 72% |
| Scientists | 6 | 11% |
| Practitioners (doctors, other healthcare professionals) | 6 | 11% |
| Science communicators (journalists, bloggers, editors) | 3 | 6% |
Mendeley readers
The data shown below were compiled from readership statistics for 118 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 118 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 16 | 14% |
| Student > Bachelor | 16 | 14% |
| Student > Master | 14 | 12% |
| Researcher | 14 | 12% |
| Student > Doctoral Student | 8 | 7% |
| Other | 12 | 10% |
| Unknown | 38 | 32% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 20 | 17% |
| Biochemistry, Genetics and Molecular Biology | 7 | 6% |
| Pharmacology, Toxicology and Pharmaceutical Science | 7 | 6% |
| Chemistry | 7 | 6% |
| Psychology | 6 | 5% |
| Other | 26 | 22% |
| Unknown | 45 | 38% |
Attention Score in Context
This research output has an Altmetric Attention Score of 162. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 13 December 2021.
All research outputs
#255,662
of 25,743,152 outputs
Outputs from Tobacco Control
#143
of 3,461 outputs
Outputs of similar age
#5,893
of 352,895 outputs
Outputs of similar age from Tobacco Control
#5
of 45 outputs
Altmetric has tracked 25,743,152 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 3,461 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 35.7. This one has done particularly well, scoring higher than 95% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 352,895 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 98% of its contemporaries.
We're also able to compare this research output to 45 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 88% of its contemporaries.