Physicochemical characterisation of different welding aerosols.
Summary of "Physicochemical characterisation of different welding aerosols."
Physicochemical properties important in exposure characterisation of four different welding aerosols were investigated. Particle number size distributions were determined by scanning mobility particle sizer (SMPS), mass size distributions by separation and weighing the individual size fractions of an 11-stage cascade impactor. The size distribution of the primary particles of agglomerates, chemical composition and morphology of the particles were examined by TEM. There were significant differences in the particle number size distributions of the different welding aerosols according to the SMPS determinations. The particle mass size distributions determined gravimetrically were, however, not really different. The dominant range with respect to mass was between 0.1 and 1 μm, regardless of the welding technique. Most of the primary particles in all different welding aerosols had diameters between 5 and 40 nm. All types of primary particles had a tendency to form chainlike agglomerates. A clear size dependence of the particle chemical composition was encountered in the case of manual metal arc welding aerosol. Small particles with diameters below 50 nm were mostly metal oxides in contrast to larger particles which also contained more volatile elements (e.g. potassium, fluorine, sodium, sulphur).
National Institute of Occupational Health, P.O. Box 8149 Dep., 0033, Oslo, Norway, email@example.com.
This article was published in the following journal.
Name: Analytical and bioanalytical chemistry
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20845032
- DOI: http://dx.doi.org/10.1007/s00216-010-4185-7
Welding fume particles have been well studied in the past; however, most studies have examined welding fumes generated from machine models rather than actual exposures. Furthermore, the link between p...
Here, we report highly transparent and flexible AgNW/SWCNT hybrid networks on PET substrates combined with plasmonic welding for securing ultrahigh stability in mechanical and electrical properties un...
Background and aims: Stabilization of implant abutments through electric impulses at high voltage for a very short time (electrowelding) was developed in the Eighties. In 2009, the same procedure was...
Abstract Objective: The use of lasers to fuse different tissues has been studied for 50 years. As none of these experiments concerned the oral soft tissues, our objective was to assess the feasibility...
We investigated organic molecular compositions of summertime aerosols collected at the summit of Mt. Fuji (3776 m a.s.l.) in July-August 2009. More than 120 organic species were identified using GC/MS...
To characterise the physical parameters (number concentration, size distribution and their trajectories) of aerosols (droplets) generated in high risk procedures.
Assessment of vessel healing after DES implantation in STEMI, NSTEMI and stable/unstable angina patients: a randomized comparison between everolimus and biolimus A9-eluting stents: an opti...
The purpose of this study is to determine whether Renalof administration promotes partial or total dissolution of urinary calculi and improves physicochemical parameters and metabolic acti...
This study is conducted in order to collect clinical samples from patients who are diagnosed of having chickenpox infection. The results of this study will provide basic scientific informa...
The purpose of this study is to characterise which fractionated electrogram morphologies are important to target in the catheter ablation of atrial fibrillation.
Medical and Biotech [MESH] Definitions
A form of pneumoconiosis resulting from inhalation of iron in the mining dust or welding fumes.
Physical reactions involved in the formation of or changes in the structure of atoms and molecules and their interactions.
Colloids with a gaseous dispersing phase and either liquid (fog) or solid (smoke) dispersed phase; used in fumigation or in inhalation therapy; may contain propellant agents.
The physical phenomena describing the structure and properties of atoms and molecules, and their reaction and interaction processes.