Evidence map›Paper›PMID 31128425›Full record

ArticleEnvironmental research2019

Analysis of the elements and metals in multiple generations of electronic cigarette atomizers.

Monique Williams, Krassimir N Bozhilov, Prue Talbot

Open access · greenAbstract read
In one paragraph

Article in Environmental research, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 3 pooled it
3.5field-weighted citation impact, top 7% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

31 citing papers in PubMed, 3 syntheses or guidelines pooled it, 60 citations in OpenAlex.

  1. Health Hazards of E-Cigarettes and Heated Tobacco Products: a Comprehensive Analysis of Hazardous Substances and Regulatory Gaps.Nicotine & tobacco research : official journal of the Society for Research on Nicotine and Tobacco · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Monique WilliamsDepartment of Molecular, Cell and Systems Biology, University of California, Riverside, CA, USA.
Krassimir N BozhilovCentral Facility for Advanced Microscopy and Microanalysis, University of California, Riverside, CA, USA.
Prue TalbotDepartment of Molecular, Cell and Systems Biology, University of California, Riverside, CA, USA. Electronic address: talbot@ucr.edu.
University of California, Riverside · US

Funding

Metals in Electronic Cigarette Aerosol R01DA036493 · NIDA · UNIVERSITY OF CALIFORNIA RIVERSIDE · PI TALBOT, PRUDENCE · 2014 to 2018
$3.6M
NIDA NIH HHS R01 DA036493
6 · The paper itself

Abstract

backgroundSince their release in 2004, electronic cigarettes (ECs) and their atomizers have undergone significant evolution.

objectiveThe purpose of this study was to evaluate and compare the elemental/metal composition of atomizers in cartomizer and tank style ECs produced over a 5-year period.

methodsPopular cartomizer and tank models of ECs were dissected and photographed using a stereoscopic microscope, and elemental analysis of EC atomizers was done using scanning electron microscopy coupled with energy dispersive x-ray spectroscopy.

resultsEight elements/metals were found in most products across and within brands purchased at different times. These included chromium, nickel, copper, silver, tin, silicon, aluminum, and zinc. Iron and lead were found in some but not all products, while manganese, cobalt, molybdenum, titanium, and tungsten were only found in a few of the products. The metals used in various components were often similar in cartomizer and tank models. Filaments were usually chromium and nickel (nichrome), although in some newer products, the filament also contained iron, copper, and manganese. The thick wire in earlier products was usually copper coated with silver, while in some newer products, the thick wire was predominantly nickel. In all products, the wick was silica, and sheaths, when present, were fiberglass (silicon, oxygen, calcium, aluminum, magnesium). Wire-to-wire joints were either brazed or clamped with brass (copper and zinc), and air-tube-to-thick wire joints, when present, were usually soldered with tin. Tank style products generally lacked a thick wire and sheaths.

conclusionIn general, atomizer components in ECs were remarkably similar over time and between brands. Certain elements/metals were consistently found in most models from all generations, and these should be studied carefully to determine if their transfer to aerosols affects user's health and if their accumulation in trash affects the environment.

Indexed as

Electronic Nicotine Delivery SystemsMetalsNebulizers and VaporizersTrace ElementsMicroscopy, Electron, ScanningSpectrometry, X-Ray EmissionMetalsTrace ElementsAtomizersE-cigarettesElectronic cigarettesMetalsTobacco products

Identifiers

PMID31128425
PMCPMC8283816
OpenAlexW2945582753

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.